Question about Philips 42PF7320A 42 in. Plasma HDTV

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No image when switching on after overnight off

What are "caps in the power supply" and how can you replace them?

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Capacitors. they look like small cans on the power supply. if you do in fact know which ones are bad, you need to replace them with the exact same size, type, voltage and microferads. and a soldering iron. not recomended if you have never done it before. but if it's not on the power supply, the caps are a little bigger than the head of a pin, so do not try to replace them.

Posted on Jul 31, 2009


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Either the power switch on the remote or on the TV do not work? Any indicator light on the front at all?
If all of the above are true, then you will have to open it up and inspect the power supply main AC fuse, caps, connectors, etc.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors:
Learn about bad caps:
Capacitors kit: he can make you a set of caps.
Or, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.

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Red power light blinks when tv is turned on and theres no image what so ever

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My tv shut off by itself and will not come back on. I left it off overnight and tried to turn it on but still will not work

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1 Answer

My TV has been taking about 3 minutes to come on. Every now and then it it has pixels that freeze at a certain color and will clear up when i cycle the power. Is this possibly a power supply problem?

Samsung caps

Above should be a link to a picture of the caps if not google " Samsung power supply caps" and look for other images.
Hope this helps

Once the back cover is removed the caps are obvious to spot (especially with that picture I forwarded) you need to label and remove all the plugs - unscrew the board from the chassis so you can get to the solder side of the board.
Once there all that is required is to observe how the caps are placed in - and + side of caps and unsolder the old caps 10V 1000Uf and replace with new ones of higher value 16V 1000Uf

If your feeling adventurous do it yourself otherwise get quote from a reputable shop.

Also google "Samsung power supply capacitor replacement" and there may be step-by-step instructions with pix.

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1 Answer

The problem is when you switch it off, especially using the button it will not come back on. You have to leave it disconnected from the mains for at least an hour, sometimes overnight.

Replace all electrolytic caps on small upright boads on the power supply board.
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1 Answer

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