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Sony KDL-40V2500 Goes on and off.

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Turnip:
Hi folks,
Have one of these where the set comes on normally then runs for two/three minutes then cuts picture and sound with the noise of the PS relay clicking - Led remaining Green.

Couple of minutes later it comes on again, then off again as before - then repeats. Thought maybe PS (1-871-504-11) or even inverter, but thought ask before I waste cash.

Any thoughts ? - Thanks - Chris.

fix2003:
check for bad   transformer  on  invertor   board

Turnip:
Hi Vince and thanks,

Checked trannies and they all read 2.4k output to output. Thought to resolder drive chips, trannies and anything looking suspect - Still the same.

Noticed if I left the set on long enough through several cycles I eventually got a Nine flash error code, which doesn't seem to relate to anything in the manual, as 4 flash appears inverter error code.

Note that CSN303-00 / PCB2674 and partner seem Hen's teeth on the Flea - Chris.

sparky:
Hi Chris think a circuit protector goes o/c not cannot remember location
Check previous listing on Sony faults

Turnip:
Hi Sparky, and happy Crimble,

Was checking through Sony files and recall some dodgy diodes on the 5v supply of one model and another with a small value electrolytic cap in same area that gives trouble.

With an odd flash code that doesn't seem to relate to anything, problem could be most anywhere, just wish I had a screen smash, so i could narrow it down a bit.

Suggested to cust it would prob be 100+ Heard a gasp.

With a set this old, backlight tubes might well be the problem, although not noticeable from the front. Taking it apart so near Christmas to check 'em isn't on the cards - Last time I did a tubes change jobby on a 47 inch, I trapped a small fly that always appeared on the announcer's nose - Thanks again - Chris.

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