I got this TV from someone who said it would not turn on, and had the 7 blink code. When I brought it home, it turned on and worked with no problems. I tested it for a while OK, and gave it to a friend.
A few days later the TV started the 7 blink code again. All signs pointed to the SC board. I replaced the board and the TV worked again. But it was still intermittent for a while, and now won't come on at all again.
I did the process of bypassing SD and SU, same 7 blinks. I have the normal 5V and 15V voltage on the SC that are part of the voltage check on startup..
The Vsus is where the problem seems to be. With the SC disconnected from the power supply, the Vsus comes up steady to around 208V. With the SC plugged in, it comes up to around 208V but fluctuates rapidly until the 7 blinks start (It only gives it a second or so for the test before shutting down).
I'm thinking maybe the power board Vsus is breaking down under load.. Any ideas on how I can troubleshoot this?? Thanks!
EDIT: Last pic, may be hard to see, but board is discolored from heat around Vsus circuit..
A few days later the TV started the 7 blink code again. All signs pointed to the SC board. I replaced the board and the TV worked again. But it was still intermittent for a while, and now won't come on at all again.
I did the process of bypassing SD and SU, same 7 blinks. I have the normal 5V and 15V voltage on the SC that are part of the voltage check on startup..
The Vsus is where the problem seems to be. With the SC disconnected from the power supply, the Vsus comes up steady to around 208V. With the SC plugged in, it comes up to around 208V but fluctuates rapidly until the 7 blinks start (It only gives it a second or so for the test before shutting down).
I'm thinking maybe the power board Vsus is breaking down under load.. Any ideas on how I can troubleshoot this?? Thanks!
EDIT: Last pic, may be hard to see, but board is discolored from heat around Vsus circuit..
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