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Summary of Contents for HP U28
- Page 1 Maintenance and Service Guide U28 model SUMMARY This guide provides information about spare parts, removal and replacement of parts, diagnostic tests, problem troubleshooting, and more.
- Page 2 Devices, Inc. Bluetooth is a trademark sure to read “Important Safety Information”. owned by its proprietor and used by HP Inc. under license. NVIDIA is a trademark and/or registered trademark of NVIDIA Corporation in the U.S. and other countries.
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Page 3: Table Of Contents
Table of Content Getting started ............................2 Important safety information ........................2 Important service information and precautions ..................3 RoHS (2002/95/EC) requirements ......................3 General descriptions ..........................3 Firmware updates ..........................4 Before returning the repaired product to the customer ................. 4 Monitor features ............................5 Features .............................. -
Page 4: Getting Started
Getting started Read this chapter to learn about safety information and where to find additional HP resources. Important safety information Carefully read the cautions and notes within this document to minimize the risk of personal injury to service personnel. The cautions and notes are not exhaustive. Proper service methods are important to the safe, reliable operation of equipment. -
Page 5: Important Service Information And Precautions
Important service information and precautions ● Repair must be performed by professional service technicians in a repair center. End users should not perform these procedures. ● Please note during servicing that the primary side is the high voltage area. ● This monitor meets ROHS requirements. -
Page 6: Firmware Updates
Firmware updates Firmware updates for the monitor are available at support.hp.com. If no firmware is posted, the monitor does not need a firmware update. Before returning the repaired product to the customer Perform an AC leakage current check on exposed metallic parts to be sure the product is safe to operate without the potential of electrical shock. -
Page 7: Monitor Features
For safety and regulatory information, refer to the Product Notices provided in your documentation kit. To access the latest user guides or manuals for your product, go to http://www.hp.com/support and follow the instructions to find your product. Then select Manuals. -
Page 8: Front Components
Front components To identify the components on the front of the monitor, use this illustration and table. Table 1-1: Front components and their descriptions Component Function Turns the monitor on or of. Power button NOTE：Be sure that the master power switch on the monitor is in the On position to turn on the monitor. -
Page 9: Rear Components
Rear components To identify the components on the rear of the monitor, use this illustration and table. Table 2-2: Rear components and their descriptions Component Function OSD joystick Opens the OSD menu, selects an item from the menu. or closes the OSD menu. -
Page 10: Locating The Serial Number And Product Number
The SPEC label (1) and Barcode label (2) are located on the rear of the monitor. The serial number and product number are located on a Safety label. You may need these numbers when contacting HP about the monitor model. - Page 11 For India:...
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Page 12: Illustrated Parts Catalog
Illustrated parts catalog To identify the monitor major components, use this illustration and table. Item Description Item Description 6019 #ASSY Neck_GR_AL 5F04 #Power Key_GR_ABS+OBP 6020 #ASSY Base_GR_AL 5F06 #Chassis_GR_AL 6021 #ASSY Base Holder_GR_PC 5F07 #EVA_30_30_0.25_ 2C01 #Bucket-GR_ABS+OBP 5F08 #EVA_GR_10.1_6_4 2C02 #Warning Lable_GR 5F09 #HAS_Bracket_GR_SGCC... -
Page 13: How To Order Parts
You can purchase cables from the HP part store at https://partsurfer.hp.com/Search.aspx. NOTE: HP continually improves and changes product parts. For complete and current information about supported parts for your computer, go to http://partsurfer.com, select your country or region, and then follow the on-screen instructions. -
Page 14: Removal And Replacement Procedures
Removal and replacement procedures Adherence to these procedures and precautions is essential for proper service. Preparation for disassembly Use this information to properly prepare to disassemble and reassemble the monitor. 1) Read the “Important safety information” and “Important service information and precautions” sections in the “Getting started”... - Page 15 1) Remove wall mount screws and rear cover, Take the electric screwdriver and remove the 4 rear cover wall mounted screws (as shown blue circle) and remove rear cover. 2) Remove the rear cover and key board. Remove the rear cover first, after disassembling the rear cover, hold the rear cover with your hand (do not damage the wire), remove the buttons from the rear cover, and then put the rear cover aside.
- Page 16 4) Remove aluminum tape and backlight wire. Tear off the three aluminum tape at the yellow square, and then pull out the backlight wire from the interface (when you take out the backlight wire, hold down the backlight wire connector), and remove the backlight wire from the hook, as shown in the blue square. 5) Remove the screws of the shielding cover.
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Page 17: Power Board （Adapter
8) Remove the mid bezel and main bracket.Remove the mid bezel and the main bracket, as shown in the figure. Power board （adapter） The power board part number is 60703-00280.(adapter) 1) The HP U28 power board connector position is as follows:... -
Page 18: Displayport Connector Location
DisplayPort connector location This procedure includes HDMI,DP connectors. The connectors are on the main board (board part number 21201-03113). The connectors identifiers are as follows: Connector Location HDMI P103 P105 USB-C P111 Earphone P602 USB-A P502，P503， P504 Before repairing connectors, follow these steps: ▲... - Page 19 3) Use a hot air gun to melt the solder on the pins. 4) Lift the P103 connector from the PCB. 5) Place the new component on the PCB. Be sure that it matches the PCB footprint. 6) Solder the new component.
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Page 20: Function Test
Function test After repair, be sure to confirm that all functions are working. Support and troubleshooting The following table lists possible problems, the possible cause or each problem, and the recommended solutions. Table 4-2: Solving common problems Problem Possible cause Solution Screen is blank Power cord is disconnected. - Page 21 Input Signal Out Video resolution and/or refresh rate are set Change the settings to a of Range is higher than what the monitor supports. supported setting. displayed on screen. The monitor is The monitor’s power saving control is Open the OSD menu and off, but it did not disabled.
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Page 22: Index
Index components RC removal, 11 front, 5 rear components, 6 rear, 6 removal connector repair, 16 power board, 14 features, 4 RC, 11 firmware updates, 3 removal and replacement procedures, 11 front components, 5 returning to customer, 3 function test, 17 RoHS (2002/95/EC) requirements, 3 how to order parts, 10 safety information, 2...
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