Quote:
Originally Posted by andy
If it's intermittent, then I'd just about bet my life on bad soldering. Shorted transistors, and blown ICs don't fix them selves. It could also be a firmware bug that's causing problems (eg. corrupted NVRAM locking up the micro controller). I fixed one LCD TV with badly distorted video by reprogramming the settings EEPROM from the one in a good set.
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Bad soldering was my first guess, but I've looked all over for bad soldering, and touched up numerous solder connections that were fine to begin with. It's not a huge board, but there are so many solder connections... and bad soldering would lead to a host of other issues. Apart from this one issue, these TV's have nothing else wrong with them, apart from the occasional TV with programming issues.
The TV's that work, work just fine. We have two being used here as computer monitors. They're left on all day long. We've been using them for a couple months with no issues. It seems that if one of these TV's can make it past 2 or 3 weeks, then the chances of it failing drop drastically.
These TV's are all failing in the same way. This tells me that the failure is occurring in the same area, and maybe the same component or solder connection. Only one TV so far displayed this intermittent behavior, out of maybe 15-20 that have just outright failed without any warning whatsoever.