SONY TV WON'T POWER UP WHEN COLD.

hi,
Blinking led in sony tv is its self dioganising function. 7 blinks by it means the horizontal output voltage increased above 33k.
You have to check the power supply stage of you tv. Normally in sony tv dry soldering can happend in the power supply stage. It will lead to unregulated voltage output from the power supply. Resolder all the points in the power supply section it will solve your problem.
ok

Hello Fixya Customer,

Thank you for your question.

Based on your symptoms, there could be several possibilities. The power supply, deflection, and high voltage circuit.

A common fault is in the High Voltage power supply circuit, and it can be corrected by repairing or replacing the main board.

Thank you for using Fixya, and if you should have any additional questions, please ask.

When fails to turn on: if you get a front LED blink of 4, 6, or 7 x, then pause, then likely power supply IC is intermittent with temperature. A lot of shops will want to replace the whole board for hundreds more, though. So ask a shop if they can fix this problem to component level 1st recommended.

The Power Supply/ Deflection Board is called the "D" Board. Replacing this Board should fix your problem. You can try to order one from Sony at 1800-222-SONY. If it is not available, you will need to send it to Sony for them to rebuild it. That will cost around $400.00 or so.
I hope this helps,
Skyassoc

I have this Sony KV-32HS500 DA-4 chassis complete service manual,i can email you the power supply circuit or any other parts you may need.Its about 18 megs in size.

we have the same porblem. We just unplug ours and wait a couple of weeks while watching another tv plug and un plug it will eventually come on then we dont turn it off again it only goes off if the power goes off.

Maybe This site will help you.

http://esupport.sony.com/US/perl/model-faq.pl?mdl=KV32HS500

the power supply is a switched mode. you need to take your tv to a w/shop, and let them check the following.
powersupply rectifier diodes, power trasistor lekage,
diodes, zener diodes,
if a 90-110 volts to the line trasistor,
a line transistor be checked.
the tv simple problem

what is the blinking pattern? blink pause blink

plug out the tv and let it stand for about 2hrs so that it can reset itself if that does not work take the set to a tech for repairs the problem is in the power supply and related circuits good luck.