Re: Help on replacement of touch-sensitive power button
Thank you, budm and Curious.George for your reply!
Surface of the button is flat and smooth, so I guess that the button is photoreflective. However, I am going to open the monitor and perform visual inspection first. At the same time learning basic troubleshooting and testing by following the links.
ezli
New Member
Last Activity: 05-30-2020, 10:36 PM
Joined: 10-04-2016
Location: Calgary, Alberta
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Help on replacement of touch-sensitive power button
I have a S2440L Dell monitor which is periodically on and off, and I have searched and found that the problem is called "power cycles". a temporary solution can be used below:
*Turn the monitor off
*Disconnect the cable from the rear of the monitor
*Press and hold in the monitor power button for 10 seconds
*Reconnect the power cable to the rear of the monitor
*Try to use the monitor
This method works most time, but some time the monitor does not work which shows blinking/dark. So I guess that I should replace the touch-sensitive... -
Re: New Members - please post your introductions here
Hello All, This is Ed from Canada - a software IT guy with strong interesting in repair hardware. I started touching computer from 1984 and I was an electronic assembler long time ago. I found this great forum and I wish to learn more electronic knowledge and repair skills from all of you. Thanks a lots!Leave a comment:
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Re: 50PK550-UD cannot be turn on
There is a sticker with barcode and strings "05EBR040-0001 65775302", "RH05G101L8". I have reflowed the mainboard last night (i.e. baked it in oven under 200°C about 10 min.), but it still does not work. I am going to buy a mainboard or repair it locally, and I will update if any of results. Thanks everybody's help!Leave a comment:
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Re: 50PK550-UD cannot be turn on
The part number should be EAX61358603(1), it seems out of stocks everywhere
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Re: 50PK550-UD cannot be turn on
Thank you ReeceyBurger123!
I just learn and run the test patterns:
Yes, with the mainboard disconnected I can see the test patterns. Does this means that the mainboard has problem? What should I do next?Leave a comment:
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Re: 50PK550-UD cannot be turn on
Hi TechGeek and ReeceyBurger123, thank you for quickly reply! I just re-test the voltages of the power supply connector under two states:
1. Disconnect everything from the PSU except the mainboard:
17V - It is 17.21V
5.1V- It is 5.205V
ERRROR_DET- It is 5.205V
STBY – it is 5.178V
AC_DET – it is 2.437V
M_ON – it is 0.002V
The data above is almost same as the testing yesterday.
2. Disconnect everything from the PSU:
17V - It is 17.24V
5.1V-...Leave a comment:
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50PK550-UD cannot be turn on
Hello Friends,
I have a 50” LG Plasma TV bought in 2010, the picture quality and audio are all good but it was died suddenly two week ago. I have tried to troubleshoot the problem by basic diagnose, components measurement and reading lots in Badcap Forum, but I am still wondering what I should do next step. Please help if any possible suggestions, Thanks!
TV Specifications:
MODEL NO: 50PK550-UD; SVC CODE: 50PK550-UD.ACCALHR
Symptoms:
Picture of the TV initially appeared unstable, and lasted about 2 minutes then died totally... -
Re: New Members - please post your introductions here
Hello All, This is Ed from Canada - a software IT guy with strong interest in hardware, and I started touching computer in 1984. I was an electronic assembler long time ago though I wished to be able to fix radio receiver, TV ... ( I just found this great forum and hope to learn more real electronic knowledge from you. Thanks!
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