Hello, I'm new to posting, but not at all new to reading here. Thank you all for all your past help you didn't know you gave!
I just bought a really cheap Sony Bravia TV with no picture for myself to fix. I have a good deal of electronic repair experience, and have been doing a lot lately, so I figured this would be relatively simple, but no go, so here's the deal.
It's a 32” (31.5” diagonally) Sony model KDL32s5100. The tv turns on fine. Green power light comes on solid and stays on. Backlights are bright. Unit is in great condition and hardly used it appears. Not tampered with.
No picture though. No menu, nothing but backlit screen (screen is perfect). I can change the brightness with a combination of button pushes, so I can assume the menu is working, just I cant see the graphics.
No bulged electrolytic caps. Touched up any iffy solder on power supply (no change). No cracks. All wire connections there. All insulators intact.
Two strange things:
1) I read 56 volts from 3 heat sinks on the power supply to ground (hurt to find out) (is this normal? I've never seen it)
2) one pin off the power supply says 30v 2mA on the board, but only tests 17v. (I don't know why, and can't figure how everything can work but the screen if the power supply is bad)
Any suggestions? Where should I be looking? I'm thinking main board, or power supply, but don't know what I'm looking for on the main, and the power is on.
Any help is great, I really want to fix this one.
Thank you !
I just bought a really cheap Sony Bravia TV with no picture for myself to fix. I have a good deal of electronic repair experience, and have been doing a lot lately, so I figured this would be relatively simple, but no go, so here's the deal.
It's a 32” (31.5” diagonally) Sony model KDL32s5100. The tv turns on fine. Green power light comes on solid and stays on. Backlights are bright. Unit is in great condition and hardly used it appears. Not tampered with.
No picture though. No menu, nothing but backlit screen (screen is perfect). I can change the brightness with a combination of button pushes, so I can assume the menu is working, just I cant see the graphics.
No bulged electrolytic caps. Touched up any iffy solder on power supply (no change). No cracks. All wire connections there. All insulators intact.
Two strange things:
1) I read 56 volts from 3 heat sinks on the power supply to ground (hurt to find out) (is this normal? I've never seen it)
2) one pin off the power supply says 30v 2mA on the board, but only tests 17v. (I don't know why, and can't figure how everything can work but the screen if the power supply is bad)
Any suggestions? Where should I be looking? I'm thinking main board, or power supply, but don't know what I'm looking for on the main, and the power is on.
Any help is great, I really want to fix this one.
Thank you !
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