Compaq 1234 Maintenance & Service Manual
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Compaq 1234 Maintenance & Service Manual

Presario 1200 series
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Compaq 1234 Maintenance & Service Manual

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  • Page 1 Thank you for purchasing this Factory Service Manual CD/DVD from servicemanuals4u.com. Please check out our eBay auctions for more great deals on Factory Service Manuals: servicemanuals4u...
  • Page 2 Welcome to the Maintenance & Service Guide (MSG). This online guide is designed to serve the needs of those whose job it is to repair Compaq products. Many of the components of the hardcopy MSG are contained in this online guide. The Notice, contains the copyright and trademark information. The Preface shows symbol conventions, Technician Notes and Serial Number locations on the unit.
  • Page 3 Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1230 and 1232 Compaq Home Search Showroom Service Worldwide Compaq.com Comments? Copyright Revised: 22 October 1998 file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...%201238%201240%201242%201250%201252/index.html (2 of 2)6/27/2004 2:22:38 AM...
  • Page 4 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 5 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 First Edition (August 1998) Compaq Computer Corporation 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...201238%201240%201242%201250%201252/notice.html (2 of 2)6/27/2004 2:22:39 AM...

  • Page 6: Pin Assignments

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance & Service Guide...

  • Page 7: Serial Number

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, and 1252 WARNING: Only authorized technicians trained by Compaq should repair this equipment. All troubleshooting and repair procedures are detailed to allow only subassembly/module level repair. Because of the complexity of the individual boards and subassemblies, the user should not attempt to make repairs at the component level or to make modifications to any printed circuit board.

  • Page 8: Product Description

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 9 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 based portable computer allows full desktop functionality. 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...01238%201240%201242%201250%201252/product.html (2 of 2)6/27/2004 2:22:40 AM...

  • Page 10: Troubleshooting

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 11 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 If the problem is intermittent, check the NOTE: computer several times to verify that the problem is solved.

  • Page 12: Illustrated Parts Catalog

    June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance & Service Guide Presario 1200 Series Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal &...
  • Page 13 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20check...%201238%201240%201242%201250%201252/illust.html (2 of 2)6/27/2004 2:22:41 AM...

  • Page 14: Removal And Replacement Procedures

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 15: Hard Drives

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Hard Drives CD Drive Battery Charger Board Modem Display Panel Assembly Upper CPU Cover Speaker Assembly Diskette Drive...

  • Page 16: Specifications

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 17: System Interrupts

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Dimensions 1.97 in 4.95 cm Height 12.20 in 31.00 cm Depth 10.08 in 25.40 cm Width Weight 7.326 lb 3.33 kg...

  • Page 18: System Dma

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Hardware IRQ System Function IRQ0 Timer Interrupt IRQ1 Standard 101/102-Key or Microsoft Natural Keyboard IRQ2 Programmable interrupt controller...

  • Page 19: System Memory Catalog

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 System I/O Address I/O Address (Hex) System Function (Shipping Configuration) x0000 - x000F Direct memory access controller x0020 - x0021...
  • Page 20 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 System Memory Catalog Memory Address System Function x00000000 - x0009FFFF System board extension for PnP BIOS x000A0000 - x000AFFFF...

  • Page 21: Memory Expansion

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Display Dimensions Information Information Width not available not available Height Depth Weight Information Information not available not available...
  • Page 22 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Hard Drives 3.2-GB 4.0-GB Capacity Per Drive Information not available Information not available Drive Type Information not available...

  • Page 23: Battery Pack

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Data Buffer Capacity Information not available Battery Pack Battery Pack Nickel Metal Hydride (NiMH) Lithium Ion (Li ion) * Dimensions 0.8 in (20.3 mm)

  • Page 24: Connector Pin Assignments

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Compaq.com United States Maintenance & Service Guide Presario 1200 Series Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252...
  • Page 25 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Connector Signal Carrier Detect Receive Data Transmit Data Data Terminal Ready Signal Ground Data Set Ready Ready to Send...

  • Page 26: Universal Serial Bus

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Red Analog Green Analog Blue Analog Not connected Ground Ground Analog Ground Analog Ground Analog Not connected Ground...
  • Page 27 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Connector Signal Unused Unused Ring Unused Unused 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...01238%201240%201242%201250%201252/connec1.html (4 of 4)6/27/2004 2:22:46 AM...
  • Page 28 June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance & Service Guide Presario 1200 Series Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal &...

  • Page 29: Maximizing The Energy Stored

    The table below shows the approximate battery pack charge times. Approximate Battery Charge Time Computer On Line Off Line NiMH Battery Pack 4.0 hours premature termination 2:00 hrs Li ion Battery Pack 4.5 hours premature termination 2:50 hrs file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20check...201238%201240%201242%201250%201252/battery.html (2 of 3)6/27/2004 2:22:47 AM...
  • Page 30 Disposal of a Used Battery Pack In the interest of safeguarding our environment. Compaq Computer Corporation recommends that nickel metal hydride (NiMH) and lithium ion (Li ion) battery packs be recycled. Battery packs should be handled in accordance with country, state, province, or local regulations.

  • Page 31: Models And Features

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Compaq.com United States Maintenance & Service Guide Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252...

  • Page 32: Controls And Lights

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 33 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Compaq Home Search Showroom Service Worldwide Compaq.com Comments? Copyright Revised: 22 October 1998 file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...201238%201240%201242%201250%201252/contrs.html (2 of 2)6/27/2004 2:23:06 AM...

  • Page 34: Left-Side Components

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 35: Right-Side Components

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 36 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 37 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20checked%20ok/NOTEBOOK...35%201236%201237%201238%201240%201242%201250%201252/bottom.html (2 of 2)6/27/2004 2:23:08 AM...
  • Page 38 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 39: Power Management Settings

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 40: Display Properties

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Always on System Standby: Never 15 minutes Turn OFF Monitor After 15 minutes After 10 minutes Always on System Standby: After 15 minutes...
  • Page 41 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 can be the result of a low battery condition. As it enters Hibernation your computer will display a progress screen, as it automatically saves the machine state before it shuts down and turns itself off.

  • Page 42: Battery Operating Time

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 seconds to shut it down, then, remove the battery or unplug the AC power for at least 30 seconds. Reinsert the battery or reconnect AC power and press the Power Button once to reboot.

  • Page 43: Preliminary Steps

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 44 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...201238%201240%201242%201250%201252/prelim.html (2 of 2)6/27/2004 2:23:10 AM...

  • Page 45: Clearing The Power-On Password

    June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance & Service Guide Presario 1200 Series Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal &...

  • Page 46: Remove The Modem

    9. Reassemble the computer. 10. Turn on the computer to verify that the power-on password has been cleared. If it has not been cleared, repeat Steps 1 through 10. 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...01238%201240%201242%201250%201252/ponpass.html (2 of 2)6/27/2004 2:23:11 AM...

  • Page 47: Power-On Self Test (Post)

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 48 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 XX000YZZ 201-Memory Error Probable Cause Recommended Action 301-Keyboard Error Probable Cause Recommended Action Keyboard failure 1. Ensure the keys are not depressed during POST.

  • Page 49: Compaq Diagnostics

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Compaq.com United States Maintenance & Service Guide Presario 1200 Series Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252...

  • Page 50: View System Information (Inspect)

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 5. Press Enter to continue. The Diagnostics menu appears. 6. Select Computer Checkup from the Diagnostics menu. A Test Option menu appears.
  • Page 51 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 4. Press Enter to continue. The Diagnostics menu appears. 5. Select View System Information (INSPECT) from the Diagnostics menu.

  • Page 52: Diagnostic Error Codes

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 53 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 501 through 516 Video Test 2402 through 2456 2458 through 2480 3206 Audio Test 8601 through 8602 Touch Pad Pointing Device Test...
  • Page 54 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 215-xx Random address test failed Keyboard Test Error Codes 300-xx Failed ID Test 1. Check the keyboard connection. If...
  • Page 55 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 1701-xx Hard drive format test failed 1. Run the Configuration and Diagnostics Utilities and verify drive 1702-xx Hard drive read test failed type.
  • Page 56 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Video screen memory page test 511-xx failed 512-xx Video gray scale test failed 514-xx Video white screen test failed...
  • Page 57 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 2425-xx ECG/VGC monochrome graphics mode test failed 2431-xx 640 × 480 graphics test failure 2432-xx 320 × 200 graphics (256 color...
  • Page 58 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 4. Replace the CD drive and retest. 6600-xx ID test failed 5. Replace the system board and retest.

  • Page 59: Troubleshooting Without Diagnostics

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 60: Solving Minor Problems

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 61 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Computer is beeping and battery LED Battery charge is low. Immediately save any open file(s). icon is blinking.

  • Page 62: Solving Diskette And Diskette Drive Problems

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Battery pack has partially self- Condition the battery pack by fully discharged. charging, fully discharging, then fully recharging it.

  • Page 63: Solving Display Problems

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Drive error has occurred. Run Computer Checkup from the Compaq Diagnostics diskette. Diskette is not formatted. Format the diskette. At the system...
  • Page 64 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Screen is blank. Screen save was initiated by Power Press any key or touch the Touch Pad. Management due to lack of user activity.

  • Page 65: Solving Hard Drive Problems

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 ** This problem indicates that the backlight or its power circuitry has failed. Since you cannot observe the POST result on the display panel when the backlight is not functioning, connect the unit to an external monitor before powering the unit up.

  • Page 66: Solving Hardware Installation Problems

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 CAUTION: To prevent loss of information, always maintain an up-to-date backup of your hard drive at all times, in case of errors or failures.

  • Page 67: Solving Memory Problems

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Solving Memory Problems Some common causes and solutions for memory problems are listed in the following table. Solving Memory Problems...

  • Page 68: Contacting Compaq Support

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 69 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Ensure that there is no diskette in the diskette drive and that there are no IMPORTANT: PC Cards in the PC slots.

  • Page 70: System Unit

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1230 and 1232 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance & Service Guide Presario 1200 Series...
  • Page 71 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1230 and 1232 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20checked%20ok/NOTEBOOKS...235%201236%201237%201238%201240%201242%201250%201252/system.html (2 of 2)6/27/2004 2:23:18 AM...
  • Page 72 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 73 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...201238%201240%201242%201250%201252/boards.html (2 of 2)6/27/2004 2:23:19 AM...
  • Page 74 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 75 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20check...201238%201240%201242%201250%201252/display.html (2 of 2)6/27/2004 2:23:19 AM...

  • Page 76: Mass Storage Devices

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Compaq.com...

  • Page 77: Miscellaneous Cables Kit

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 78 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...201238%201240%201242%201250%201252/cables.html (2 of 2)6/27/2004 2:23:21 AM...

  • Page 79: Power Cord

    June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance & Service Guide Presario 1200 Series Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal &...
  • Page 80 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...201238%201240%201242%201250%201252/newp41.html (2 of 2)6/27/2004 2:23:21 AM...
  • Page 81 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1230 and 1232 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance & Service Guide Presario 1200 Series...
  • Page 82 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1230 and 1232 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20che...201238%201240%201242%201250%201252/newp6.html (2 of 2)6/27/2004 2:23:22 AM...

  • Page 83: Miscellaneous Parts

    June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance & Service Guide Presario 1200 Series Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal &...
  • Page 84 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20check...01238%201240%201242%201250%201252/miscella.html (2 of 2)6/27/2004 2:23:23 AM...

  • Page 85: Documentation And Software

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 86: Electrostatic Discharge

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 87 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Removing DIPS from vinyl trays 11,500 V 4,000 V 2,000 V Removing DIPS from Styrofoam 14,500 V 5,000 V...

  • Page 88: Service Considerations

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 89 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20check...201238%201240%201242%201250%201252/service.html (2 of 2)6/27/2004 2:23:25 AM...

  • Page 90: Cables And Connectors

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 91: Plastic Parts

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Plastic Parts Plastic parts can be damaged by the use of excessive force during disassembly and reassembly. When handling the plastic parts, use care.

  • Page 92: Preparing The Computer For Disassembly

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 93: Diskette Drive

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Display Panel Do not crush, puncture, or incinerate the battery pack. CAUTION: Assembly Do not open a battery pack, as this damages the pack, makes it unusable, and exposes potentially harmful battery components.

  • Page 94: Removing The Battery Pack

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 95 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Upper CPU Cover Speaker Assembly Diskette Drive Fan Assembly System Board Dip Switch Settings Memory Module 1.800.AT.COMPAQ privacy and legal statement...

  • Page 96: Removing The Palmrest Cover With Touch Pad

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 97: Speaker Assembly

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Speaker 2. Close the Assembly computer and turn Diskette Drive the computer upside down. Fan Assembly System Board 3.

  • Page 98: Removing The Heatspreader

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 99: Display Panel Assembly

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 To replace Display Panel Assembly heatspeader, Upper CPU reverse the Cover previous procedures. Speaker Assembly Diskette Drive Fan Assembly...

  • Page 100: Removing The Keyboard

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 101 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 4. Remove the Display Panel heatspreader Assembly Upper CPU Cover Speaker Next Step Assembly Diskette Drive Fan Assembly...

  • Page 102: Removing The Processor

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 103: Battery Charger

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 into the Battery bottom slot Charger opening on Board processor Modem and push Display toward the Panel display to...
  • Page 104 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 105 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 hard drive Battery mounting Charger bracket and Board lift up the hard drive. Modem Display Next Step Panel...

  • Page 106: Removing The Cd Drive

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 107 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 the back CD Modem drive. Display Panel Next Step Assembly Upper CPU Cover Speaker Assembly Diskette Drive Fan Assembly...

  • Page 108: Removing The Battery Charger Board

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 109 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 and lift out of the Battery chassis. Charger Board Modem To replace the Display Panel battery charger Assembly...

  • Page 110: Removing The Modem

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 111 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 pull the Upper CPU modem off Cover Speaker connector on Assembly the system board. Diskette Drive Fan Assembly...

  • Page 112: Removing The Display Panel Assembly

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 113 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Fan Assembly System Board Dip Switch Settings Memory Module 1.800.AT.COMPAQ privacy and legal statement file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...237%201238%201240%201242%201250%201252/59.html (2 of 2)6/27/2004 2:23:36 AM...

  • Page 114: Removing The Upper Cpu Cover

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 115 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Palmrest 6. Remove Cover with display Touch Pad panel Heatspreader assembly. Keyboard 7. Remove Processor the screw Hard Drives...

  • Page 116: Removing The Speaker Assembly

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 117 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 drive. Keyboard Processor 6. Remove Hard Drives display CD Drive panel assembly. Battery Charger Board 7. Remove Modem...

  • Page 118: Removing The Diskette Drive

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 119 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Battery 7. Remove the Charger screw from the diskette drive Board and lift up the Modem diskette drive.

  • Page 120: Removing The Fan Assembly

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 121: Cpu Cover

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 assembly. Battery Charger Board 6. Remove Modem hard Display Panel drive. Assembly Upper CPU 7. Remove Cover Upper cover.

  • Page 122: Removing The System Board

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...

  • Page 123: Remove The Fan

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 12. Remove the drive. Diskette Drive Fan Assembly 13. Remove the fan. System Board Dip Switch Settings 14. Disconnect the speaker assembly cables.
  • Page 124 June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance & Service Guide Presario 1200 Series Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal &...

  • Page 125: Removing The Memory Module

    "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 United States June 27, 2004 STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | COMPAQ SEARCH Maintenance &...
  • Page 126 "Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1250, and 1252 door, and Display Panel slide the Assembly memory Upper CPU module Cover door to the right. Speaker Assembly...

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