Originally Posted by sully1231
I bought a KDF-E42A10 for $50 a few months ago; it randomly turns off and on by itself so i replaced the bulb and while the picture became much clearer, the off/on issue continues. The green light flashes for about 30-40 seconds then the set turns on again. The frequency seems to be higher during the first 45min of use and then it seems to happen less and less the longer the tv is on. The red lamp light does not flash at all. No diagnostic codes are present. Also, if the set is off for several hours, to turn it on i have to unplug the set, wait at least 10 seconds,plug it in and then press the power button and wala - the set turns on.
Issue#2: The yellow blob appeared after i replaced the bulb so from reading this thread it appears that would be the LCD panels which i can replace. I don't want to put more than a couple hundred more if i can help it, so your help and advice are greatly appreciated. Thank you.
"The green light flashes for about 30-40 seconds then the set turns on again." This is the normal bootup init process. Why it turns off is the problem.
Couple of possibilities: 1) there is a plague of cheap lamps around, sold on ebay for $40 or so. Their reliability is terrible. Out-of-box failure rate high, and in the very best cases they only last a few months.
2) this model is terrible for plugged-up main lamp fans. They can get so plugged with dirt that while the wheel moves freely and the fan doesn't signal failure, it will not move any air because none can get in. Then the lamp area overheats, and there is a sensor there that can shut down the tv.
3) on some sets where the lamp door switch is barely working, as the chassis plastic heats up and crackles and expands, the lamp switch might fail to engage. Examine the lamp door and figure that out. It's pretty simple.
4) examine the lamp contacts on the lamp side and the tv side from the inside. They take a lot of heat and they can just fall apart.
"Issue#2: The yellow blob ..." To fix that you need another set to steal parts from, and even then it's a painstaking process of trial and error in doing the physical convergence.
You've already spent more than a 42" is worth. You might be better off declaring the 42" the donor and watching Craigslist for a compatible 55" or 60" Sony. Possibles would be another KDF-E, or a WE610 or WF655. Craigslist is rotten with them, and they are cheap. Stay away from E2000, A2000, and XBR1 & 2 which are completely different.