Hello! Yesterday I picked up the TV mentioned above. Obviously I knew it was bad, I bought it to be fixed.
Chassis: Q551.2E
It won't power up, only blinks 2 long, then 2 short on the standby LED. Then repeats till you pull it out from the wall. I checked the manual and it states a bad SSB, but I don't just wanna give up already.
Before I did anything, ofc I checked PSU voltages, all were fine. They were not unstable or anything. (however, 3.3 would stay at 2.9 - 3V constantly, is it bad?)
Then I tried is to pull everything out of the mainboard, only the power supply and mainboard (SSB?) was plugged together. The TV did not power up, however, I got 9 blinks instead. The service manual told me it's a "backend board" problem, which I suppose, is the board that is between the SSB and Tcon.
I plugged it back in, however, the 2 blink problem came back.
I tired the SDM mode, which gave me several error codes:
-14 (SSB)
-17 (Power supply)
-38 (Backend)
-44 (Backend)
-45 (Backend)
-54 (TCON/Display)
Well, first of all, I don't know if the TV has so many problems (like, is it possible?!), or it just logged that I unplugged everything, and it's stored in the Error Buffer and will be displayed until it clears itself... (because I can't clear it since I can't get to SAM mode).
However, the fact that it states ALL board that is inside the TV is faulty, is pretty stupid imo.
Measuring the SSB, then I found a bad fuse, that carries 12V to the Backend(?) board. I quickly replaced it, and although I finally could measure voltages on the backend board, all the errors remained (maybe because the error buffer?)
The TV still can't power up.
Another "fun" fact: although the TV is constantly rebooting (maybe because of the error 14), I managed to get it to stand-by mode twice already, and also, there were 3 moments, when the ambilight came on for a few seconds (however, I couldn't see anything on the screen, since the backend board +12v supply was missing).
What would you say, or try? Is the TV saveable? Maybe a CPU reflow could help?
Chassis: Q551.2E
It won't power up, only blinks 2 long, then 2 short on the standby LED. Then repeats till you pull it out from the wall. I checked the manual and it states a bad SSB, but I don't just wanna give up already.
Before I did anything, ofc I checked PSU voltages, all were fine. They were not unstable or anything. (however, 3.3 would stay at 2.9 - 3V constantly, is it bad?)
Then I tried is to pull everything out of the mainboard, only the power supply and mainboard (SSB?) was plugged together. The TV did not power up, however, I got 9 blinks instead. The service manual told me it's a "backend board" problem, which I suppose, is the board that is between the SSB and Tcon.
I plugged it back in, however, the 2 blink problem came back.
I tired the SDM mode, which gave me several error codes:
-14 (SSB)
-17 (Power supply)
-38 (Backend)
-44 (Backend)
-45 (Backend)
-54 (TCON/Display)
Well, first of all, I don't know if the TV has so many problems (like, is it possible?!), or it just logged that I unplugged everything, and it's stored in the Error Buffer and will be displayed until it clears itself... (because I can't clear it since I can't get to SAM mode).
However, the fact that it states ALL board that is inside the TV is faulty, is pretty stupid imo.
Measuring the SSB, then I found a bad fuse, that carries 12V to the Backend(?) board. I quickly replaced it, and although I finally could measure voltages on the backend board, all the errors remained (maybe because the error buffer?)
The TV still can't power up.
Another "fun" fact: although the TV is constantly rebooting (maybe because of the error 14), I managed to get it to stand-by mode twice already, and also, there were 3 moments, when the ambilight came on for a few seconds (however, I couldn't see anything on the screen, since the backend board +12v supply was missing).
What would you say, or try? Is the TV saveable? Maybe a CPU reflow could help?
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