Question about Pioneer PDP-4270XD 42 in. HD-Ready Plasma Television

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Tv stuck on standby

My tv is stuck on standby. It switched itself off. And now, when the power is supplied, the standby light comes on but the tv will not switch on.

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Power supply probably needs to be replaced if you don't even hear the relay click after the power is switched on.

Posted on Mar 30, 2009

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1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
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1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

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Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.4_10_2012_2_12_56_am.jpg
Look for puffed up caps like these in the power supply board.

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It supplies among other things the power (usually less then 12 volts DC to run the remote circuitry---It usually is not fuse protected so if a strike hit nearby it may have come in via the power cord.

Trouble is almost certain to be in the standby supply.

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Repair kit Now available on Ebay.. BUY NOW
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200884727409


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Good Day SIr, sound to me like your switching power supply is not working properly, there is an IC that controls the switching action of your power supply, this MAY be the reason why it stays off. locate the IC at the power supply section, replace it then test. There is also a possibility of open low value resistors near the switching transistor (very hard to locate). hope this helps.

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