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LG 42PC1D Clicking repeatedly

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tom66:

--- Quote from: cdel on January 06, 2012,14:44:14 ---£30 for audio video and mainboard including post.

--- End quote ---

You have me interested, sending a PM.

tom66:
I found a 1.8V regulator on the main board that was putting out only 1.3V. However, I'm looking carefully at the datasheet (SC156515M) and it may be simply that it is automatically switching over (if ADJ > 0.2V, it uses that voltage; otherwise, it uses internal feedback resistors.) Will have a look later at the divider resistors, if any, to determine if it is faulty or not. Seems to power a main processor of some kind.

The package looks extremely difficult to remove as it's got a nice large thermal pad; so I may just replace the entire board if I find one faulty.

Tried resetting eeprom to no luck.

tom66:
Sadly, I changed the main board & AV board, but it's still not working. :41:

I noticed that when the Y-sus or Z-sus connectors are unplugged the voltages do not rise... when they are plugged in they are correct. Don't know if this is significant.

Going to have one last look at it, before assembling it and selling it for spares. I have spent nearly £100 on this with no luck so far. You win some, you lose some...

If anyone is interested, let me know. Comes with a recapped power supply and two new boards.

tom66:
It's FINALLY fixed. It was the AC detect, something with it was wrong. No matter, I just bridged both optocouplers (the two on the board where the dot faces the other way) and it's now working perfectly. Low level sparklies & image retention, but nothing a bit of tweaking can't fix.

cdel:
congaratulation. :sign0098:

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