Can anyone tell me, what's Technically wrong in My TV, i am including details that will surely help you, help me!
My TV was barely used and has no water or physical damage. One day it started showing vertical/horizontal lines that gradually got worse. It now sometimes shows a normal picture but intermittently glitches, blacks out (screen goes black but sound/OS continue), or shows heavy line artifacts.
What I found and did
- Opened the TV and found dead and live cockroaches inside; there was some droppings on the PCB. I cleaned the board with PCB alcohol and brushed away the droppings.
- Cleaned connectors and ribbon contacts, reseated ribbons.
- After removing and reinserting the two ribbon cables, the TV boots but now glitches every 5–20 seconds (previously it glitched every second and never showed a stable image). Sometimes the screen goes black but returns automatically. Sound/OS remain running.
Would it help to know, that these were the voltage readings on the Tcon board. i am just a noob, who got a multimeter and normal stuff. The TV model is Mi 43 4A 2018 model.
- VGL = -5v
- HVDD - 7.9v
- VDD - 16.2v
- VCOM - 6.17v
- VGH - 28V
Can anyone point me in the right direction? can anyone read these symptoms and predict where the problem could be coming from? is the panel shorted? or the Tcon or the main board, is this issue from any particular electronic component? if you want to instruct me to check exactly what with my voltmeter and where.
if you will tell me, i will follow your instructions and comeback with my findings. 🙏🙂