I took apart the TV to check and examine the LED strips. I measured them with the multimeter in DIODE mode and some LED diodes were burned out (they didn't turn on and others did). I ordered a new LED strip but when I put it in, some LED diodes burned out again. I did a little online research and it turns out that this TV model has a common fault in its power supply in the part that feeds the backlight. From here on I need your help because I don't know much about this type of power supply. Thank you very much in advance.
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Hi. I have a problem with Asus ROG GA402RK. The keyboard suddenly stopped working along with the kb backlight. I replaced the keyboard and the ITE KBC chip and the problem is still the same. I don't see any passive elements that look damaged. Does anyone have an idea?04-28-2025, 04:30 PM
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hello everyone!
As the title states i am an owner of an LG flatron M2362DP 23 inch monitor Tv. Since i currently use it as a tv i'm posting the problem on the "troubleshooting tvs and video sources" section.
I'm from Greece so English isn't my native language, so please forgive me for any mistakes i make. I have basic knowledge in electronics, and although i have a degree, many things have changed since i finished a 2 year coarse (over 30 years ago). Occasionally i repair easy stuff, mostly things that break at home like appliances.
So i decided to try to... -
hello I have a backlight problem on this TV, if I unplug the cn201 cable the backlight works perfectly and the voltages are 13v if I connect the cn201 cable the backlight goes off and the voltage drops to 12v, I assume it's a motherboard problem, the question is has anyone had a similar problem? I want to understand if the motherboard is repairable or it's not worth wasting time... -
Hello,
I have this All-in-one PC, after SSD change there is no picture. I was found out it is a backlight problem, but LEDs are OK. There is 4 led strings each working on 42,4V, but from board is comming only 5V.
I was repaired many backlights before but this design i will not understand.
For me it looks like it is waiting for some signal from screen to start up the backlight or something like this. Nothing seems to be damaged or shorted here.
Can someone explain me please what to do, what to check?
Thanks.... -
this tv is throwing me for a loop. do samsung tvs no longer have the backlight self test feature built into the power supply?
i tested the backlight with my LED tester and it lights up both strips. one of them reads 100v and the other reads 63.7v.
unplugged mainboard from power supply but left backlight plugged in, and then plugged psu wall power in. expected to see backlights light up but see nothing.
according to how ive diagnosed in the past, this would almost always be a bad power supply. replacement power supply was cheap like 20$ from ebay. but still i get not even...