20 Most Recent Philips 42PF7320A 42 in. Plasma HDTV - Page 8 Questions & Answers

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.

check the power supply for bad capacitors if they are ok then replace the power supply boarrd.
good luck

To start , ensure that the problem does not depend on sygnal input (from description it does not look this way, but you never know). Test different inputs using different cables.

If the lines are moving, then it is a voltage drop. Since volts is applied at different heights on the plasma panel, a voltage drop can cause colored lines that move across the screen. In this case, a defective voltage regulator, a faulty cable to plasma screen , or a defective sustain board can cause the problem.

If instead the picture has static bands, and they come up always in the same position, scrambling the image, then you may also have a problem on main digital controlled board, where the video signal is generated.
In that case testing will be more complex, and there is need to follow indications on service manual to test the chipsets on board.
Boards that must be tested are Logic main, Y main, ribbon cable to Y main, Y buffers (both), all ribbon cables between this boards.
Also a diagnostic procedure from service menu can help in finding the fault.

See testing diagrams at page 26, and parts location starting at page 7 of service manual below:

Service manual available here.

Regards.

I think you have to replace the power supply board.

Bad caps in the power supply must be replaced .

It's a common software problem with the Philips TVs. You'll have to download the latest software upgrade to fix the problem. Go to Philips.com/support to find the software for your TV. You'll need a USB memory stick to do the procedure followed on the web site.

change its main procesing IC

Most of the newer Philips TVs have upgradeable software to fix that problem. You'll need a USB memory stick to download the software for the TV. Go to the Philips web site and they should have the correct software for your TV and will have the procedure for you to do the software upgrade.

Picture tube needs to be checked.

Most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
But, I can't say it's 100% the problem because I can't actually look at the tv over the internet.

If you have some electronic experience, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you red light flashing codes, circuit diagrams, test points, and part# lists. Usually, cost under $20. And most cases the new part cost less than $15.

I hope I shed some light on the subject for you.

Hi,

I had the same problem and fixed with a great online tutorial. Just replace 3 capacitors available at Radioshack onthe the board. 2662, 2663, 2664 1 is a 1000uf the others are 100uf. Max Volts need to be over 25. It worked great, check http://dynamicorange.com/2008/06/25/fixing-a-plasma-tv/
for more detail.
Thanks for conatacting Fixya.

I had the Same issue. on a 50PF9431D/37 set. Many Plasma Set's use a LJ44-00118A PS-505-PH Power supply from Samsung. Known to have this common problem. If you can, or have a friend that can Solder components?. Unplug your set remove the back panel & locate your power supply. It will be the PCB in the center of the set just above the Video/Audio connections. http://www.shopjimmy.com/power-supply-unit-lj44-00118a-from-philips-50mf231d-40.htm. Is a Link to a photo of the PCB. Make a note of the locations of all cable connections then unplug them all. Un-install PCB, Check all Fuse first. I believe their is 5 or 6 of them on the PCB. Then replace the two 3300uf 10v 105C Radial capacitors at C8060 & C8059. Look to see if the Caps are deformed and or split at the top. The location of the caps are in the Lower bottom edge of the PCB. A local shop may Carrie them if not, digi-key has them. Part # http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=493-1754-ND. Total cost was $7 with S/H.

sounds like a bad display panel
verry expensive

try softwear update if not ssp pcb call phillips for soft wear

needs sft waer update call philips

there may be an issue with the push button on the side flaking out check and see if it is sticking on the cover if not I would replace that board

you should take down the tv and and clean it. try and mix vinager and water together then wipe the tv down.

Nancy and Guest. This is caused by an overload in the Y main and buffers. If you are electronically inclined and want to fix this yourself its not hard, but it is a little pricey. There are actually two problems manifested here, the sparkles are from the y main and the lines are from the buffers trying to compensate. If you're up for the daunting task of fixing this yourself, http://www.fixya.com/support/t1625867-phillips_42
This should get you started. Don't hesitate to emial directly for further help. [email protected]