Page 1 HP Compaq 6720t Mobile Thin Client Maintenance and Service Guide...
Page 2 Corporation in the United States and/or other countries. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty.
Page 3 Safety warning notice WARNING! To reduce the possibility of heat-related injuries or of overheating the computer, do not place the computer directly on your lap or obstruct the computer air vents. Use the computer only on a hard, flat surface. Do not allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs or clothing, to block airflow.
Page 4 Safety warning notice...
Page 5: Table Of Contents
Table of contents 1 Product description 2 External component identification Top components ... 3 Display ... 3 Lights ... 4 Buttons and speakers ... 5 Keys ... 6 TouchPad ... 7 Front components ... 8 Right-side components ... 9 Left-side components ... 9 Rear components ...
Page 6 Unknown user password ... 26 Component replacement procedures ... 27 Serial number ... 27 Computer feet ... 28 Battery ... 29 Flash drive ... 30 Memory module ... 31 Optical drive ... 33 Keyboard ... 35 RTC battery ... 38 Heat sink ...
Page 7 Phillips PM2.0×6.0 captive screw ... 73 Torx T8M2.5×9.0 screw ... 74 Silver Phillips PM2.0×4.0 screw ... 76 Phillips PM2.0×3.0 screw ... 77 Phillips PM2.5×3.0 screw ... 78 Phillips PM2.0×2.0 broad-head screw ... 79 Torx T8M2.5×5.0 screw ... 81 Torx T8M2.5×7.0 screw ... 83 Black Phillips PM2.0×4.0 screw ...
Page 8 viii...
Page 9: Product Description
Wireless External media card Ports Description HP Compaq 6720t Mobile Thin Client Intel® Celeron® M423 1.06-GHz processor 1-MB L2 cache, 533-MHz front side bus (FSB) Northbridge: Mobile Intel 945GM Express chipset with up to 800-MHz FSB Southbridge: Intel ICH-7M Intel unified memory architecture (UMA) graphics subsystem with up to 224-MB shared graphics subsystem memory 15.4-inch WXGA AntiGlare display assembly with 2 wireless local area network (WLAN)
Page 10 3-pin HP Smart Adapter AC power Full-sized, spill-resistant keyboard with embedded numeric keypad TouchPad only, with 2 TouchPad buttons and vertical scrolling 65-W HP Smart Adapter with localized cable plug support (3-wire plug with ground pin, supports 3-pin DC connector) 6-cell, 47-Wh Li-ion battery...
Page 11: External Component Identification
External component identification Top components Display Item Component Wireless antennae (2) Display release latch Function Send and receive signals from one or more wireless devices. These antennae are not visible from the outside of the computer. Opens the computer. Top components...
Page 12: Lights
Lights Item Component Wireless lights* (2) Power lights† (2) Battery light Drive light Caps lock light Numeric lock light Volume mute light Chapter 2 External component identification Function Blue: An integrated wireless device, such as a wireless ● local area network (WLAN) device, is on. Off: All wireless devices are off.
Page 13: Buttons And Speakers
Item Component *The 2 wireless lights display the same information. The light on the wireless button is visible only when the computer is open. The wireless light on the front of the computer is visible whether the computer is open or closed. †The 2 power lights display the same information.
Page 14: Keys
Keys Item Component Windows logo key Windows applications key Numeric keypad keys Function keys Chapter 2 External component identification Function Displays system information when pressed in combination with the key. Executes frequently used system functions when pressed in combination with a function key or the Displays the Windows Start menu.
Page 15: Touchpad
TouchPad Item Component TouchPad* Left TouchPad button* Right TouchPad button* TouchPad scroll zone *This table describes factory settings. To view or change pointing device preferences, select Start > Control Panel > Printers and Other Hardware > Mouse. Function Moves the pointer and selects or activates items on the screen.
Page 16: Front Components
Front components Item Component Wireless light Power light Battery light Drive light Display release latch Chapter 2 External component identification Function On: An integrated wireless device, such as a wireless ● local area network (WLAN) device, is on. Off: All wireless devices are off. ●...
Page 17: Right-Side Components
Right-side components Item Component Audio-out (headphone) jack Audio-in (microphone) jack USB ports (2) Optical drive (select models only) Left-side components Item Component Security cable slot RJ-45 (network) jack RJ-11 (modem) jack Vent USB port PC Card slot Function Produces sound when connected to optional powered stereo speakers, headphones, ear buds, a headset, or television audio.
Page 18: Rear Components
Rear components Item Component Power connector External monitor port Bottom components Item Component Battery bay Battery release latches (2) Accessory battery connector Business card holder Memory module compartment Flash drive bay Vent Docking connector Chapter 2 External component identification Description Connects an AC adapter.
Page 19: Illustrated Parts Catalog
Illustrated parts catalog Serial number location When ordering parts or requesting information, provide the computer serial number and model number located on the bottom of the computer. Serial number location...
Page 20: Computer Major Components
Computer major components Item Description 15.4-inch, WXGA, antiglare display assembly (includes display panel cable and 2 wireless antenna transceivers and cables) Display internal components: Display bezel Chapter 3 Illustrated parts catalog Spare part number 467783-001 466164-001...
Page 21 Item Description Display hinges (includes left and right hinges) Display inverter Switch cover (includes LED board and cable) Keyboards For use in Belgium For use in the Czech Republic For use in Denmark For use in France For use in French Canada For use in Germany For use in Greece For use in Hungary...
Page 22 Item Description For use in Canada, Cayman Islands, Guam, Puerto Rico, the U.S. Virgin Islands, and the ● United States For use in Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, ● Argentina, Armenia, Aruba, Australia, Austria, Azerbaijan, the Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bermuda, Bhutan, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, the British Virgin Islands, Brunei, Bulgaria, Burkina Faso, Burundi, Cameroon, Cape Verde, the Central African Republic, Chad, Chile, the...
Page 23 Item Description (16) 1024-MB, PC2-5300, 667-MHz, DDR2 memory module (17) 6-cell, 47-Wh Li-ion battery (18) 8X Max DVD-ROM Drive (includes bezel and bracket) Spare part number 414046-001 467784-001 467782-001 Computer major components...
Page 24: Plastics Kit
Plastics Kit Item Description Plastics Kit: Flash drive bay cover (includes 2 captive screws, secured by C-clips) PC Card slot bezel Memory module compartment cover (includes one captive screw, secured by a C-clip) Chapter 3 Illustrated parts catalog Spare part number 417527-001...
Page 25: Miscellaneous Parts
Miscellaneous parts Description 65-W HP Smart Adapter Power cords: For use in Australia and New Zealand For use in Brazil For use in Japan For use in South Korea For use the United States Screw Kit Hex HM5.0×11.0 screw lock ●...
Page 26: Sequential Part Number Listing
Power cord for use in Brazil 246959-291 Power cord for use in Japan 246959-AD1 Power cord for use in South Korea 391172-001 65-W HP Smart Adapter 414046-001 1024-MB, PC2-5300, 667-MHz, DDR2 memory module 417520-001 Switch cover (includes LED board and cable) 417526-001...
Page 27 Spare part Description number 466422-001 Base enclosure (includes 8 rubber feet) 466423-001 Top cover (includes TouchPad board and cable, TouchPad button board and cable, speakers and cable) 466424-001 System board (includes RTC battery and replacement thermal material) 467782-001 8X Max DVD-ROM Drive (includes bezel and bracket) 467783-001 15.4-inch, WXGA, antiglare display assembly (includes display panel cable and 2 wireless antenna transceivers and cables)
Page 28 Spare part Description number 481424-BG1 For use in Slovenia 481424-B31 For use in Israel 481424-B71 For use in Switzerland 481424-DD1 For use in Iceland 481424-DJ1 For use in Greece Chapter 3 Illustrated parts catalog...
Page 29: Removal And Replacement Procedures
Removal and replacement procedures Preliminary replacement requirements Tools required You will need the following tools to complete the removal and replacement procedures: Flat-bladed screwdriver ● Magnetic screwdriver ● Phillips P0 and P1 screwdrivers ● Torx T8 screwdriver ● Service considerations The following sections include some of the considerations that you must keep in mind during disassembly and assembly procedures.
Page 30: Cables And Connectors
Cables and connectors CAUTION: When servicing the computer, be sure that cables are placed in their proper locations during the reassembly process. Improper cable placement can damage the computer. Cables must be handled with extreme care to avoid damage. Apply only the tension required to unseat or seat the cables during removal and insertion.
Page 31: Grounding Guidelines
Grounding guidelines Electrostatic discharge damage Electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure determine the degree of sensitivity. Networks built into many integrated circuits provide some protection, but in many cases, ESD contains enough power to alter device parameters or melt silicon junctions. A discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or microcircuitry.
Page 32: Packaging And Transporting Guidelines
Packaging and transporting guidelines Follow these grounding guidelines when packaging and transporting equipment: To avoid hand contact, transport products in static-safe tubes, bags, or boxes. ● Protect ESD-sensitive parts and assemblies with conductive or approved containers or packaging. ● Keep ESD-sensitive parts in their containers until the parts arrive at static-free workstations. ●...
Page 33: Equipment Guidelines
Equipment guidelines Grounding equipment must include either a wrist strap or a foot strap at a grounded workstation. When seated, wear a wrist strap connected to a grounded system. Wrist straps are flexible straps ● with a minimum of one megohm ±10% resistance in the ground cords. To provide proper ground, wear a strap snugly against the skin at all times.
Page 34: Unknown User Password
Unknown user password If the computer you are servicing has an unknown user password, follow these steps to clear the password: NOTE: These steps also clear CMOS. Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system.
Page 35: Component Replacement Procedures
Make special note of each screw size and screw lock location during removal and replacement. Serial number Report the computer serial number to HP when requesting information or ordering spare parts. The serial number is located on the bottom of the computer. Component replacement procedures...
Page 36: Computer Feet
Computer feet The computer feet are adhesive-backed rubber pads. The feet are included in the Rubber Kit, spare part number 480830-001. There are four oblong rubber feet (1) and four square rubber feet (2), that attach to the base enclosure in the locations illustrated below. Chapter 4 Removal and replacement procedures...
Page 37: Battery
Battery Description 6-cell, 47-Wh Li-ion battery Before disassembling the computer, follow these steps: Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system. Disconnect all external devices connected to the computer. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer.
Page 38: Flash Drive
Flash drive Description 1-GB flash drive (includes flash drive bracket) Before removing the flash drive, follow these steps: Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system. Disconnect all external devices connected to the computer.
Page 39: Memory Module
Remove the flash drive (3) from the flash drive bay. If it is necessary to replace the flash drive bracket, slide the module out of the bracket. Reverse this procedure to reassemble and install the flash drive. Memory module Description 1024-MB (PC2-5300, 667-MHz, DDR2) Before removing the memory module, follow these steps: Shut down the computer.
Page 40 Lift the right edge of the cover (2), swing it up and to the left, and remove the cover. The memory module compartment cover is included in the Plastics Kit, spare part number 417527-001. Spread the retaining tabs (1) on each side of the memory module slot to release the memory module. (The edge of the module opposite the slot rises away from the computer.) Remove the memory module (2) by pulling the module away from the slot at an angle.
Page 41: Optical Drive
Optical drive NOTE: All optical drive spare part kits include an optical drive bezel. Description 8X Max DVD-ROM Drive Before removing the optical drive, follow these steps: Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system.
Page 42 Remove the optical drive bracket (2). Reverse this procedure to reassemble and install an optical drive. Chapter 4 Removal and replacement procedures...
Page 43: Keyboard
Keyboard Description Keyboards for use in the following countries or regions: Belgium The Czech Republic Denmark France French Canada Germany Greece Hungary Iceland Israel Italy Japan The Netherlands Norway Before removing the switch cover and keyboard, follow these steps: Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system.
Page 44 Remove the keyboard: Remove the two Torx T8M2.5×9.0 screws that secure the keyboard to the computer. Turn the computer display-side up, with the front toward you. Open the computer as far as possible. Slide the four keyboard retention tabs (1) toward you. The tabs are located between the keys, between the keys.
Page 45 Release the zero insertion force (ZIF) connector (1) to which the keyboard cable is attached, and disconnect the keyboard cable (2) from the system board. Remove the keyboard. Reverse this procedure to install the keyboard. Component replacement procedures...
Page 46: Rtc Battery
RTC battery NOTE: Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords and CMOS settings to be cleared. Description RTC battery Before removing the RTC battery, follow these steps: Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system.
Page 47: Heat Sink
Heat sink Description Heat sink (includes replacement thermal material) Before removing the heat sink, follow these steps: Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system. Disconnect all external devices connected to the computer.
Page 48 Reverse this procedure to install the heat sink. Chapter 4 Removal and replacement procedures...
Page 49: Wlan Module
WLAN module Description Broadcom 802.11a/b/g WLAN modules: ● For use in Canada, Cayman Islands, Guam, Puerto Rico, the U.S. Virgin Islands, and the United States For use in Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, ● Armenia, Aruba, Australia, Austria, Azerbaijan, the Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bermuda, Bhutan, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, the British Virgin Islands, Brunei, Bulgaria, Burkina Faso, Burundi, Cameroon, Cape Verde, the Central African Republic, Chad, Chile, the People's Republic of China, Colombia,...
Page 50 Remove the WLAN module (3) by pulling the module away from the slot at an angle. NOTE: WLAN modules are designed with a notch (4) to prevent incorrect installation. Reverse this procedure to install the WLAN module. Chapter 4 Removal and replacement procedures...
Page 51: Switch Cover
Switch cover Description Switch cover (includes LED board and cable) Before removing the switch cover, follow these steps: Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system. Disconnect all external devices connected to the computer.
Page 52 Remove the switch cover (2) by lifting it straight up. Reverse this procedure to install the switch cover. Chapter 4 Removal and replacement procedures...
Page 53: Display Assembly
Display assembly NOTE: All display assembly spare part kits include 2 WLAN antenna transceivers and cables. Description 15.4-inch, WXGA, antiglare display assembly (includes display panel cable and 2 wireless antenna transceivers and cables) Before removing the display assembly, follow these steps: Shut down the computer.
Page 54 Remove the six Torx T8M2.5×9.0 screws (1) that secure the display assembly to the computer. Lift the display assembly (2) straight up and remove it. If it is necessary to replace the display bezel, display inverter, or display hinges, remove the rubber screw covers and screws listed below.
Page 55 Remove the display bezel (4). The display bezel is available using spare part number 466164-001. If it is necessary to replace the display inverter, disconnect the display panel cable (1) and the backlight cable (2) from the display inverter. Remove the six Torx T8M2.5×5.0 screws (1) that secure the display panel to the display enclosure.
Page 56 Remove the display inverter (3). The display inverter is available using spare part number 466167-001. If it is necessary to replace the display hinges, remove the four Phillips PM2.0×4.0 screws (1) that secure each display hinge to the display panel. Remove the display hinges (2).
Page 57: Top Cover
Top cover Description Top cover (includes TouchPad board and cable, TouchPad button board and cable, speakers and cable) Before removing the top cover, follow these steps: Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system.
Page 58 Disconnect the speaker cable (1) from the system board. Remove the four Torx T8M2.5×5.0 screws (2) that secure the top cover to the computer. Lift the rear edge of the top cover (1) and swing it up and forward until it rests at an angle. Lift up on the outside edges of the top cover left and right sides (2) until the top cover disengages from the base enclosure.
Page 59: Modem Module
Modem module NOTE: The modem module spare part kit does not include a modem module cable. The modem module cable is included with the system board frame, spare part number 480894-001. Description Modem module Before removing the modem module, follow these steps: Shut down the computer.
Page 60: System Board And System Board Frame
Disconnect the modem module cable (3) from the modem module. Remove the modem module. Reverse this procedure to install the modem module. System board and system board frame Description System board (includes RTC battery and replacement thermal material) System board frame (includes modem module cable) Before removing the system board and system board frame, follow these steps: Shut down the computer.
Page 61 When replacing the system board, be sure that the following components are removed from the defective system board and installed on the replacement system board: Memory module (see Memory module on page ● WLAN module (see WLAN module on page ●...
Page 62 Remove the system board frame and system board (3) from the base enclosure. Release the modem module cable (1) from the two clips built into the system board. Release the RJ-11 connector (2) from the clip built into the system board. Remove the three Torx T8M2.5×4.0 screws (3) that secure the system board to the system board frame.
Page 63: Pc Card Assembly
Remove the system board (2) by pulling it away from the system board frame at an angle. Reverse the preceding procedure to install the system board and system board frame. PC Card assembly Description PC Card assembly Before removing the PC Card assembly, follow these steps: Shut down the computer.
Page 64 Remove the PC Card assembly: Turn the system board upside down, with the front toward you. Remove the two Phillips PM2.0×4.0 screws that secure the PC Card assembly to the system board. Turn the system board right side up, with the front toward you. Disengage the hook on the PC Card assembly from the tab (1) on the system board connector.
Page 65: Modem Module Cable
Modem module cable NOTE: The modem module cable is included with the system board frame, spare part number 480894-001. See System board and system board frame on page 52 Before removing the modem module cable, follow these steps: Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system.
Page 66: Audio/Usb Board
Audio/USB board Description Audio/USB board (includes audio board cable and USB board cable) Before removing the audio/USB board, follow these steps: Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then shut it down through the operating system.
Page 67 Lift the rear edge of the audio/USB board (2) until the board is clear of the base enclosure. Remove the audio/USB board from the base enclosure. Reverse this procedure to install the audio/USB board. Component replacement procedures...
Page 68: Computer Setup
Computer Setup Starting Computer Setup Computer Setup is a preinstalled ROM-based utility that can be used even when the operating system is not working or will not load. NOTE: Some of the Computer Setup menu items listed in this guide may not be supported by your computer.
Page 69: Using Computer Setup
Using Computer Setup Navigating and selecting in Computer Setup The information and settings in Computer Setup are accessed from the File, Security, Diagnostics, and System Configuration menus. Open Computer Setup by turning on or restarting the computer, and then pressing "F10 = ROM Based Setup"...
Page 70: Computer Setup Menus
Computer Setup menus The menu tables in this section provide an overview of Computer Setup options. NOTE: Some of the Computer Setup menu items listed in this chapter may not be supported by your computer. File menu Select System information Restore defaults Ignore changes and exit Save changes and exit...
Page 71: Diagnostics Menu
Diagnostics menu Select Memory Check System Configuration menu NOTE: Some of the listed System Configuration options may not be supported by your computer. Select Language (or press f2) Boot Options Device Configurations Built-In Device Options Port Options To do this Run a comprehensive test on system memory.
Page 72: Specifications
Specifications Computer specifications Dimensions Length Width Height (front to rear) Weight (equipped with optical drive, flash drive, and battery) 2.54 kg Input power Operating voltage Operating current Temperature Operating (not writing to optical disc) Operating (writing to optical disc) Nonoperating Relative humidity Operating Nonoperating...
Page 73: 15.4-Inch, Wxga Display Specifications
Nonoperating NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. The computer operates well within this range of temperatures. 15.4-inch, WXGA display specifications Dimensions Height Width Diagonal Number of colors Contrast ratio Brightness Pixel resolution Pitch Format Configuration Backlight Character display Total power consumption...
Page 74: 8X Max Dvd-Rom Drive Specifications
8X Max DVD-ROM Drive specifications Applicable disc Access time Random Cache buffer Data transfer rate CD-R (24X) CD-RW (10X) CD-ROM (24X) DVD (8X) Multiword DMA mode 2 Chapter 6 Specifications DVD-ROM (DVD-5, DVD-9, DVD-10, DVD-18, CD-ROM (Mode 1 and 2), CD Digital Audio, CD-XA ready (Mode 2, Form 1 and Form 2), CD-I (Mode 2, Form 1 and Form 2), CD-R, CD-RW, Photo CD (single and multisession), CD-Bridge <...
Page 75: System Dma Specifications
System DMA specifications Hardware DMA DMA0 DMA1* DMA2* DMA3 DMA4 DMA5* DMA6 DMA7 *ExpressCard controller can use DMA 1, 2, or 5. System function Not applicable Not applicable Not applicable Not applicable Direct memory access controller Available for ExpressCard Not assigned Not assigned System DMA specifications...
Page 76: System Interrupt Specifications
System interrupt specifications Hardware IRQ IRQ0 IRQ1 IRQ2 IRQ3 IRQ4 IRQ5* IRQ6 IRQ7* IRQ8 IRQ9* IRQ10* IRQ11 IRQ12 IRQ13 IRQ14 IRQ15 *Default configuration; audio possible configurations are IRQ5, IRQ7, IRQ9, IRQ10, or none. NOTE: ExpressCards may assert IRQ3, IRQ4, IRQ5, IRQ7, IRQ9, IRQ10, IRQ11, or IRQ15. Either the infrared or the serial port may assert IRQ3 or IRQ4.
Page 77: System I/O Address Specifications
System I/O address specifications I/O address (hex) 000 - 00F 010 - 01F 020 - 021 022 - 024 025 - 03F 02E - 02F 040 - 05F 044 - 05F 062 - 063 065 - 06F 070 - 071 072 - 07F 080 - 08F 090 - 091...
Page 78 I/O address (hex) 220 - 22F 230 - 26D 26E - 26 278 - 27F 280 - 2AB 2A0 - 2A7 2A8 - 2E7 2E8 - 2EF 2F0 - 2F7 2F8 - 2FF 300 - 31F 320 - 36F 370 - 377 378 - 37F 380 - 387 388 - 38B...
Page 79: System Memory Map Specifications
System memory map specifications Size 640 KB 128 KB 48 KB 160 KB 64 KB 15 MB 58 MB 58 MB 2 MB 4 GB 64 KB Memory address 00000000-0009FFFF 000A0000-000BFFFF 000C0000-000CBFFF 000C8000-000E7FFF 000E8000-000FFFFF 00100000-00FFFFFF 04800000-07FFFFFF 04800000-07FFFFFF 08000000-080FFFFF 08200000-FFFEFFFF FFFF0000-FFFFFFFF System memory map specifications System function Base memory...
Page 80: Screw Listing
Screw listing This section provides specification and reference information for the screws and screw locks used in the computer. All screws listed in this section are available in the Screw Kit, spare part number 417526-001. Chapter 7 Screw listing...
Page 81: Phillips Pm2.0×6.0 Captive Screw
Phillips PM2.0×6.0 captive screw Color Black Where used: (1) Two captive screws that secure the flash drive bay cover to the computer (screws are captured on the cover by C-clips) (2) One captive screw that secures the memory module compartment cover to the computer (screw is captured on the cover by a C-clip) Quantity Length...
Page 82: Torx T8M2.5×9.0 Screw
Torx T8M2.5×9.0 screw Color Black Where used: (1) One screw that secures the optical drive to the computer (2) Two screws that secure the keyboard to the computer Chapter 7 Screw listing Quantity Length 9.0 mm Thread Head diameter 2.5 mm 5.0 mm...
Page 83 Where used: 6 screws that secure the display assembly to the computer Where used: 10 screws that secure the top cover to the computer Where used: 2 screws that secure the system board frame to the base enclosure Torx T8M2.5×9.0 screw...
Page 84: Silver Phillips Pm2.0×4.0 Screw
Silver Phillips PM2.0×4.0 screw Color Silver Where used: 2 screws that secure the optical drive bracket to the optical drive Chapter 7 Screw listing Quantity Length 4.0 mm Thread Head diameter 2.0 mm 4.5 mm...
Page 85: Phillips Pm2.0×3.0 Screw
Phillips PM2.0×3.0 screw Color Silver Where used: 2 screws that secure the WLAN module to the system board Quantity Length 3.0 mm Thread Head diameter 2.0 mm 4.5 mm Phillips PM2.0×3.0 screw...
Page 86: Phillips Pm2.5×3.0 Screw
Where used: 4 screws that secure the heat sink to the computer Phillips PM2.5×3.0 screw Color Black Where used: 4 screws that secure the heat sink to the computer Chapter 7 Screw listing Quantity Length 3.0 mm Thread Head diameter 2.5 mm 5.0 mm...
Page 87: Phillips Pm2.0×2.0 Broad-Head Screw
Phillips PM2.0×2.0 broad-head screw Color Black Where used: 3 screws that secure the switch cover to the computer Quantity Length 2.0 mm Thread Head diameter 2.0 mm 7.0 mm Phillips PM2.0×2.0 broad-head screw...
Page 88 Where used: 2 screws that secure the display assembly right hinge to the computer Chapter 7 Screw listing...
Page 89: Torx T8M2.5×5.0 Screw
Torx T8M2.5×5.0 screw Color Black Where used: 4 screws that secure the display bezel top edge to the display assembly Where used: 6 screws that secure the display panel to the display enclosure Quantity Length 5.0 mm Thread Head diameter 2.5 mm 5.0 mm Torx T8M2.5×5.0 screw...
Page 90 Where used: 4 screws that secure the top cover to the base enclosure Chapter 7 Screw listing...
Page 91: Torx T8M2.5×7.0 Screw
Torx T8M2.5×7.0 screw Color Quantity Length Thread Head diameter Black 9.0 mm 2.5 mm 5.0 mm Where used: 2 screws that secure the display bezel bottom edge to the display assembly Torx T8M2.5×7.0 screw...
Page 92: Black Phillips Pm2.0×4.0 Screw
Black Phillips PM2.0×4.0 screw Color Black Where used: 8 screws that secure the display hinges to the display panel Chapter 7 Screw listing Quantity Length 4.0 mm Thread Head diameter 2.0 mm 4.5 mm...
Page 93 Where used: 2 screws that secure the PC Card assembly to the system board Black Phillips PM2.0×4.0 screw...
Page 94: Torx T8M2.5×4.0 Screw
Torx T8M2.5×4.0 screw Color Black Where used: 3 screws that secure the system board to the system board frame Where used: 2 screws that secure the audio/USB board to the base enclosure Chapter 7 Screw listing Quantity Length 4.0 mm Thread Heat width 2.5 mm...
Page 95: Phillips Pm2.5×4.0 Screw
Phillips PM2.5×4.0 screw Color Black Where used: 2 screws that secure the modem module to the system board Quantity Length 4.0 mm Thread Head diameter 2.5 mm 5.0 mm Phillips PM2.5×4.0 screw...
Page 96: Torx T8M2.5×6.0 Screw
Torx T8M2.5×6.0 screw Color Black Where used: 5 screws that secure the system board frame to the base enclosure Chapter 7 Screw listing Quantity Length 6.0 mm Thread Head diameter 2.5 mm 5.0 mm...
Page 97: Hex Hm5.0×11.0 Screw Lock
Hex HM5.0×11.0 screw lock Color Silver Where used: 2 screw locks that secure the system board to the system board frame Quantity Length 11.0 mm Thread Head diameter 2.5 mm 5.0 mm Hex HM5.0×11.0 screw lock...
Page 98: Connector Pin Assignments
Connector pin assignments Audio-out (headphone) Audio-in (microphone) Chapter 8 Connector pin assignments Signal Audio out, left channel Audio out, right channel Ground Signal Audio signal in Audio signal in Ground...
Page 99: External Monitor
External monitor Signal Red analog Green analog Blue analog Not connected Ground Ground analog Ground analog Ground analog +5 VDC Ground Monitor detect DDC 2B data Horizontal sync Vertical sync DDC 2B clock External monitor...
Page 100: Modem)
RJ-11 (modem) Chapter 8 Connector pin assignments Signal Unused Ring Unused Unused Unused...
Page 101: Network)
RJ-45 (network) Universal Serial Bus Signal Transmit + Transmit - Receive + Unused Unused Receive - Unused Unused Signal +5 VDC Data - Data + Ground RJ-45 (network)
Page 102: Power Cord Set Requirements
Power cord set requirements The wide range input feature of the computer permits it to operate from any line voltage from 100 to 120 volts AC or from 220 to 240 volts AC. The 3-conductor power cord set included with the computer meets the requirements for use in the country or region where the equipment is purchased.
Page 103: Requirements For Specific Countries And Regions
Requirements for specific countries and regions Country/region Australia Austria Belgium Canada Denmark Finland France Germany Italy Japan The Netherlands Norway The People's Republic of China South Korea Sweden Switzerland Taiwan The United Kingdom The United States The flexible cord must be Type HO5VV-F, 3-conductor, 1.0-mm² conductor size. Power cord set fittings (appliance coupler and wall plug) must bear the certification mark of the agency responsible for evaluation in the country or region where it will be used.
Page 104: 10 Recycling
NOTE: Materials Disposal. This HP product contains mercury in the backlight in the display assembly that might require special handling at end-of-life. Disposal of mercury may be regulated because of environmental considerations. For disposal or recycling information, contact your local authorities, or see the Electronic Industries Alliance (EIA) Web site at http://www.eiae.org.
Page 105 Perform the following steps to disassemble the display assembly: Remove all screw covers (1) and screws (2) that secure the display bezel to the display assembly. Lift up and out on the left and right inside edges (1) and the top and bottom inside edges (2) of the display bezel until the bezel disengages from the display assembly.
Page 106 Disconnect all display panel cables (1) from the display inverter and remove the inverter (2). Remove all screws (1) that secure the display panel assembly to the display enclosure. Remove the display panel assembly (2) from the display enclosure. Turn the display panel assembly upside down. Remove all screws that secure the display panel frame to the display panel.
Page 107 Remove the display panel frame (2) from the display panel. Remove the screws (1) that secure the backlight cover to the display panel. Lift the top edge of the backlight cover (2) and swing it outward. Remove the backlight cover. Turn the display panel right-side up.
Page 108 Remove the backlight cables (1) from the clip (2) in the display panel. Turn the display panel upside down. WARNING! The backlight contains mercury. Exercise caution when removing and handling the backlight to avoid damaging this component and causing exposure to the mercury. Remove the backlight frame from the display panel.
Page 109 Remove the backlight from the backlight frame. Disconnect the display panel cable (1) from the LCD panel. Remove the screws (2) that secure the LCD panel to the display rear panel. Release the LCD panel (3) from the display rear panel. Release the tape (4) that secures the LCD panel to the display rear panel.
Page 110: Index
Index AC adapter, spare part number 17, 18 accessory battery connector 10 antenna disconnecting 41 location 3 audio, product description 1 audio-in jack location 9 pin assignments 90 audio-out jack location 9 pin assignments 90 audio/USB board removal 58 spare part number 14, 19, base enclosure, spare part number 14, 19 battery...
Page 111 electrostatic discharge 23 esc key 6 Ethernet, product description 1 external media cards, product description 1 external monitor port location 10 pin assignments 91 feet locations 28 spare part number 28 File menu 62 flash drive location 10 precautions 22 product description 1 removal 30 spare part number 14, 18,...
Page 112 pin assignments audio-in jack 90 audio-out jack 90 external monitor port 91 headphone jack 90 microphone jack 90 modem jack 92 monitor port 91 network jack 93 RJ-11 92 RJ-45 jack 93 Universal Serial Bus (USB) port 93 plastic parts 21 Plastics Kit contents 16 spare part number 14, 16,...
Page 113 USB port location 9 pin assignments 93 vents 9, 10 volume down button 5 volume mute button 5 volume mute light 4 volume up button 5 Windows applications key 6 Windows logo key 6 wireless antenna disconnecting 41 location 3 wireless button 5 wireless light 4, 8 wireless, product description 1...

HP Compaq 6720t Maintenance And Service Manual

1 Product Description

2 External Component Identification

3 Illustrated Parts Catalog

4 Removal and Replacement Procedures

5 Computer Setup

6 Specifications

7 Screw Listing

8 Connector Pin Assignments

9 Power Cord Set Requirements

10 Recycling

Index

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Summary of Contents for HP Compaq 6720t

Table of Contents