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If you must replace a capacitor, insert new parts carefully to avoid a short circuit caused by the 
near pin. 

● 

Do not get the board wet. Water and moisture can cause a short circuit that causes 
malfunctions. 

● 

To avoid damage, be sure to use lead-free solder. 

● 

When soldering, work quickly to avoid overheating the circuit board. 

● 

Keep the soldering iron tip clean and well tinned when replacing parts. 

● 

After repair, perform a close inspection of the circuit board to confirm it is in good condition. 

● 

After repair, perform a function test to confirm the power supply is working properly. 

ERP Lot5 requirement 

1. A professional repairer must have the technical competence to repair electronic displays and 
comply with the applicable regulations for repairers of electrical equipment in the Member States 
where the repairer operates. Reference to an official registration system as professional repairer, 
where such a system exists in the Member States, shall be accepted as proof of compliance. 

2. A professional repairer must have insurance that covers liabilities resulting from repairs, 
regardless of whether required by the Member State. 

RoHS (2002/95/EC) requirements 

Applied to all countries that require RoHS.

 

 

The RoHS (Restriction of Hazardous Substance in Electrical and Electronic Equipment Directive) is a 
legal requirement by the EU (European Union) for the global electronics industry sold in the EU and 
other countries. Any electrical and electronics products launched in the market after June 2006 should 
meet this RoHS requirement. Products launched in the market before June 2006 are not required to be 
compliant with RoHS parts. If the original parts are not RoHS complaint, the replacement parts can be 
non-ROHS complaint. If the original parts are RoHS compliant, the replacement parts MUST be RoHS 
complaint. 

If product service or maintenance requires replacing parts, confirm the RoHS requirement before 
replacement. 

General descriptions 

This manual contains general information. There are two levels of service: 

Level 1: Cosmetic/appearance/alignment service 

Level 2: Circuit board or standard parts replacement 

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. Do not use a line isolation transformer during this 
check. 

Measurements that are not within specified limits present a possible shock hazard. You must check and 
repair the product before returning it to the customer. 

Summary of Contents for 24mq

Page 1: ...Maintenance and Service Guide HP 24mq model SUMMARY This guide provides information about spare parts removal and replacement of parts diagnostic tests problem troubleshooting and more ...

Page 2: ... States and 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 HP shall not be liable for technical or editorial errors or omissions contained herein Firs...

Page 3: ...oduct to the customer 5 2 Monitor features 6 Features 6 Front components 7 Rear components 8 Locating the serial number and product number 9 3 Illustrated parts catalog 10 How to order parts 11 4 Removal and replacement procedures 12 Preparation for disassembly 12 RC 13 Power board 19 Connector repair 20 HDMI connector CN503 21 D SUB connector CN101 22 Function test 23 Function test 23 Support and...

Page 4: ...e on the Web at http www hp com ergo IMPORTANT For the protection of the monitor and the computer connect all power cords for the computer and its peripheral devices such as a monitor printer scanner to a surge protection device such as a power strip or uninterruptible power supply UPS Not all power strips provide surge protection the power strip must be specifically labeled as having this capabil...

Page 5: ...tance in Electrical and Electronic Equipment Directive is a legal requirement by the EU European Union for the global electronics industry sold in the EU and other countries Any electrical and electronics products launched in the market after June 2006 should meet this RoHS requirement Products launched in the market before June 2006 are not required to be compliant with RoHS parts If the original...

Page 6: ...le monitor panel mounting solutions VGA video input One HDMI High Definition Multimedia Interface video input cable provided Plug and Play capability if supported by your operating system Security cable slot provision on rear of monitor for optional security cable On screen display OSD adjustments in several languages for easy setup and screen optimization HP Display Assistant software for adjusti...

Page 7: ... menu is open the Menu light turns on 2 OSD buttons assignable When the OSD menu is open press the buttons to navigate through the menu The function light icons indicate the default button functions For a description of these functions see Using the function buttons on page 15 You can reassign the function buttons to quickly select the most commonly used operations See Reassigning the function but...

Page 8: ... Table 1 1 Rear components Component Function 1 Power connector Connects the power cord 2 HDMI port Connects the HDMI cable to a source device such as a computeror game console 3 VGA port Connects the VGA cable to the source device 4 Security cable slot Connects an optional security cable to the monitor ...

Page 9: ...serial number and product number The serial number and product number are located on a label on the rear of the monitor panel You may need these numbers when contacting HP about the monitor model For worldwide models ...

Page 10: ...tion Qty 1 PANEL 1 2 BEZEL L238W Zat10 p12 1 3 BASE_ASS Y L27W Zat10 p12 NA 1 4 LENS L215W Zat10 s10 1 5 ADAPTER BOARD NA 1 6 MAIN BOARD 1 7 MAINFRAME 1 8 KEY BOARD 1 9 REAR_COVER L238W Zat10 p12 1 10 stand ass y NA LGD 1 11 INSULATING SHEET 1 S1 SCREW 3 4 9 S2 SCREW M4 8 1 S3 SCREW D3 6 4 S4 SCREW 4 S5 SCREW M4 10 4 ...

Page 11: ...470UF 20 25V 10 16 ED EC 470UF 20 25V 10 16 1 21A ECR1EXX4 C917 Digi Key RZW471M1EBK 1016S Connectors by manufacturer Component description Location identifier Component distributor Distributer part number D SUB CN101 tme HDL15 SL B ADAM TECH HDMI CN503 RS SD 47151 001 Molex NOTE Rear cover and chassis need to be modified to hold connector Connector may need modifications to meet functional safety...

Page 12: ...ce information and precautions sections in the Getting started chapter of this guide 2 Clean the room for disassembly 3 Identify the disassembly area 4 Check the position that the monitors are to be placed along with the number of monitors Prepare the area for material flow according to the disassembly layout 5 Be sure to have the following equipment and materials Press fixture Working table Screw...

Page 13: ...or disassembly on page 12 Step Figure Description Preparation and remove the stand base ass y Lay the monitor on a flat soft and clean surface Remove the screws to remove the stand base assy Remove the rear cover Remove the rear cover Disconnect the cable and the tape Disconnect the cable and the tape ...

Page 14: ...connect the tapes and remove the screws Remove the Led Board Disconnect the tapes and remove the screws Remove the LED Board Remove the screws and disconnect the pins Remove the screws and disconnect the pins ...

Page 15: ...15 Remove the main board and the power board Remove the mylar remove the screws to remove the main board and the power board Main Board ...

Page 16: ...16 Disconnect the pins Disconnect the pins Main Board Power Board Main Board Power Board ...

Page 17: ...17 The Mainframe The Mainframe Remove the screws to remove the key board Remove the screws to remove the key board The Rear Cover The Rear Cover ...

Page 18: ...18 The panel and the bezel The panel and the Bezel ...

Page 19: ...r for disassembly See Preparation for disassembly on page 12 Remove the power board 1 The HP 24mq power board connector position is as follows 2 Locate the part number location on the board Power Board Warning After unplugging the power supply the capacitance is still charged do not touch and discharge the capacitor Power Board ...

Page 20: ... are on the main board board part number CBPRNE7HPQ6 The connectors identifiers are as follows Connector Location HDMI CN503 D SUB CN101 Before repairing connectors follow these steps Prepare the monitor for disassembly See Preparation for disassembly on page 12 Main Board CN101 CN503 ...

Page 21: ...steady soldering condition Keep the soldering iron tip clean and well tinned and when replacing parts A close inspection of the circuit board revealed look in good condition After repaired must connect source to each port to check Main board function is ordinary Note The requirement of professional repairers regulation by ERP lot5 1 The professional repairer has the technical competence to repair ...

Page 22: ...nent D SUB connector CN101 Repair the D SUB connector 1 Use a soldering iron and a disordering pump to remove as much solder as possible from the pin 2 Use a hot air gun to melt the solder on the pins 3 Lift the CN101 connector from the PCB 4 Place the new component on the PCB Be sure that it matches the PCB footprint 5 Solder the new component ...

Page 23: ...witch Input to Off and manually select the input or Replace the video card or connect the video cable to one ofthe computer s on board video sources Function test After repair be sure to confirm that all functions are working Table 4 1 Function test Te st item Operating description Tool used HDMI test Confirm whether image displays and sound plays correctly on the monitor Computer or DVD player DP...

Page 24: ...and or refresh rateare set higher than the monitor supports Change the settings to a supported setting see Preset displayresolutions on page 26 The monitor does not enter into a low power sleep state The monitor s power saving control isdisabled Open the OSD menu and select Power select Auto SleepMode and then set auto sleep to On OSD Lockout is displayed The monitor s OSD Lockout functionis enabl...

Page 25: ...s 10 parts ordering 11 power board removal 19 precautions 4 preparation for disassembly 12 RC removal 13 rear components 8 removal power board 19 RC 13 removal and replacement procedures 12 returning to customer 5 RoHS 2002 95 EC requirements 5 safety information 4 serial number location 9 service information 4 spare parts 10 support and troubleshooting 23 troubleshooting 23 ...

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