TV/Monitor - LED Matrix ON but Black Screen

Hello.

As you can easily guess my monitor stopped working. Let me somehow summarize the situation. Perhaps then someone might be able to point out what is evidently broken.

Device: LG 27MA73D-PZ (Monitor with TV)

What and How:

  1. Monitor was running for maybe 3 hours, suddenly light started blinking with black screen. Since it is TV, i tried to turn it on/off, but no reaction from pilot or front controls.
  2. Then i turned it off from power and connected elsewhere. Led matrix light was on but screen was black, couldn’t turn it on or off. No power on light. After perhaps 10 seconds screen light started blinking.
  3. After touching here and there, situation changed a bit, and led matrix light was always on as long as power was connected, and it stopped blinking but nothing else worked.

Problem Signs:

  1. Matrix led always on as long as connected to power
  2. Black Screen
  3. No power up light
  4. No reaction from pilot / buttons

I disassembled it but nothing seemed out of place, but still disconnected all the cables and connected them again. Nothing really changed.

Would appreciate any help.

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