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Old 08-07-2018, 06:51 PM
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zeno zeno is offline
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Join Date: Mar 2013
Location: New Hampshire
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Our shop at the time was a REAL Sony franchise & warranty station.
Although I am sure Sony looked into it there was never a "fix" or explanation
of what was killing them. They drive FET's in a switch mode power
supply ( SMPS ). Either the FET or the IC needs a start circuit to turn on/off
& my best guess is thats what fails. MOST fails were the run supply
( press on/off 20 times & it starts). A few were the standby ( STBY) or
"always" supply ( dead set). The only thing I have never seen tried was
adding a heat sink to the IC's.
These sets were the biggest example of the new "just junk it" mentality by
builders that started in the 90's & peaked with flat screens. You buy the
best CRT TV ever built IMHO & if you get 4 yrs if you are lucky. Damn shame
as they absolutely blew away all the new displays at the time & most
made now.

73 Zeno
LFOD !
Quote:
Originally Posted by user181 View Post
OK. Then it seems like you'll need to replace the chips. What's never been clear to me is what the exact failure mode is; whether some other problem causes the chips to fail, or if they just go bad on their own. So, there's no guarantee that new chips will solve it.

I've bought other things from Encompass Parts with success as well, so I wouldn't discourage you from buying from them.
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