Question about Philips 42PF9631D 42 in. Plasma Television

3 Answers

3 year old Philips 42PF5321D/37 TV no longer turns on.

The green LED turns on but no A/V. The A/V would only turn back on if I unplugged/ plugged the set. But It would take +1 minute before the picture would be visible and the picture would turn on then off then on then off before it stabilized. Philips asked me to do a firmware upgrade, but I was already at the latest version. I tried to re-install the firmware but nothing seemed to happen maybe since I have the same version as on the USB. The TV continued to work for several weeks as long as I unplugged and plugged the power. Today I am unable to get any A/V at all.

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  • deshome Jul 21, 2009

    I unplugged the unit for 24 hrs- no change. I was able to turn it on one more time, but it took many times plugging / unplugging. It has been getting progressively worse in that respect. There are no flashing LED's. The LED is steady green. I was able to get into the CSM mode and found that it has an error code of 04.

    I have started to take the back off to look inside. 'Hoping to find something obvious -

  • deshome Jul 22, 2009

    Interesting enough, most of the IC boards are labeled w/ Samsung, not Philips! I'm looking at the power supply board and see two 3300 uF caps that are bulging at the top. But I see no leakage or loose solder anywhere.

  • deshome Jul 23, 2009

    Well, nicolocarlo had already pointed me in the direction of the bad capacitors on the power supply. So I am working toward replacing them. I wasn't able to get replacements locally so I have ordered some and they should be delivered in the next couple of days and I will know then if this works. It sounds like this maybe is a common problem?

  • deshome Jul 28, 2009

    Thanks! nicolocarlo helped me to discover bad capacitors on the power supply. rulds2008 confirmed it. I replaced the capacitors and now my TV works like new!! I'm very happy I discovered FixYa!

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  • Philips Master
  • 3,866 Answers

Listen if you see bulging capcitor replace them you be glad you did and you will have a working TV!! Trust me i did this on a Emac even though there not the same type of unit it really doesn ot matter the problem is this a bulging cap means its not holding its correct charge and thus not able to power the rest of the TV!

Change the caps you be a happy camper you did and you will S$VE big cash!!! If you did Trust me


Thanks for using fixya I hope this helps you! If it does hit accept you be glad you did!


Rulds2008

Posted on Jul 22, 2009

  • Grand Canyon Tech
    Grand Canyon Tech Jul 23, 2009

    Well capcitors over time and heat do that and when the do yes it can be a common problem with all eletronics, remeber a good clean unit is a good running unit key it clean and free from dust, dust kills it has static eletricity that builds up a charge and if that hits a sensitive device then it would be a lot more difficult to replace.



    Thanks please hit the accept button



    Rulds2008

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  • Master
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Firmware upgrade is not the solution. There's a hardware problem inside the TV. You need to replace the INVERTER BOARD. Check the link below so that you could have an idea how the inverter board looks like:

http://www.shopjimmy.com/catalogsearch/result/index/?q=inverter+board&stock=all

Hope this helps and have a great day!

Posted on Jul 21, 2009

  • Melvin Ramos
    Melvin Ramos Jul 21, 2009

    Firmware upgrade is not the solution. There's a hardware problem inside
    the TV. You need to replace the INVERTER BOARD. Check the link below so
    that you could have an idea how the inverter board looks like:

    http://www.shopjimmy.com/catalogsearch/r...

    Hope this helps and have a great day!


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  • Master
  • 2,187 Answers

You can do a reset if you leave the device unplugged longer. I had mine unplugged overnight and it solved all issues within the 3 years of use. If it does not solve it you may check for loose connections internally. If there are internal components that may fail the TV should give out errors by flashing of lights. See if there are any.

Posted on Jul 18, 2009

  • Nicolo Carlo Parazo Jul 21, 2009

    In that case you need to look for leaks in the capacitor or soldering that had gone loose. If you know how to use a tester you can test if there are no power to some of the IC which could mean it is faulty. The solder and the IC may go bad due to heat which is one of the common cause of breakdown along with surges in the power.

  • Nicolo Carlo Parazo Jul 21, 2009

    Just to add... Inspect the power supply first. The first component that is connected to the power. See of there are leaks coming out of the capacitor. Check if there is voltage coming out of it using a tester.

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