Picture & sound shut off after a few minutes of being on (not the tv itself). A few seconds later the tv turns off. Power indicator light blinks red. After unplugging and plugging back in, tv is on without having to push any buttons. Same result, picture & sound, then the tv shuts off, red flashing power light.TV STAYS ON FOR A FEW MINUTES THEN STOPS COMPLETELY.
POWER SUPPLY OK (24V OK, 12V OK, 5V OK) iNVERTER BOARD OK (HV OK + CONTROL SIGNALS OK)
TEST ON VARIAC 70 VAC TO 135 V...OK TEST WITH HOT AIR INJECTION...OK
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When tv it shutting itself off by it own does the tv power LED light indication flashes?Tv turn on now,the tv power light indication,just flashes?Yes,than ur tv power supply board is the causes and the problems.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
The television is shutting itself off to protect itself. The blinking light is a code pattern. The specific code determines whether or not you need an LCD Controller Unit, Main Board, power supply or something else. You would need the service manual. There are parts distributors you can get it from and the parts as well. If soldering and tv repair is not something you are entirely familiar you may want to seek a tv repair person. The manufacturer's support may walk you through the service menus to complete a factory reset depending upon the symptoms.
These usually have a good Warranty as this is a Best Buy product. They would be sure to fix it under the waranty if you take it in. They would be able to give you an estimate of repair if you take it in also. They may have a flat fix fee or possibly an hourly fee along with what the power supply or bad part cost. Usually a power supply problem. 42" is still an expensive TV to replace. May be best to repair. Blessings, A/V Guy
I had a similar problem with my Phillips 42 in. LCD HD TV.
Here's the problem. The Power Supply Board. I opened my TV
up(warranty was up of course) and found several bad capacitors.
Phillips and several other companies were sold capacitors that although
were highly rated failed within 5 years because of a lack of
preservatives. All sorts of electronic equipment is now being effected
due to these defective capacitors.
1. Take it in and have it fixed
2. Open it up, check the board for faulty capacitors(bulged or leaking) Buy a new Power supply board and install it.
3. Remove PSB, remove faulty capacitors and replace with compatible new ones.
If your set was manufactured around July 2005, you may need a firmware upgrade to solve this issue. On the Sony website you can enter your model # and serial # to see if you TV is affected. If so, it is easy to have done and may be free from Sony. It sounds like the issue they described in the writeup on the required formware update. I had mine done within few months of when i bought it (purchased in Dec 2005) and it has been working flawlessly since.