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Hi, have a philips 42pf7321d/37 tv that won't turn on, I replaced 2 capacitors that were bad but when I tried to turn it on again two leds on the power supply turn on making a clicking noise they stay on for a few seconds but then turn off again. any help will be appreciated.

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Hi.

The clicking noise and the leds on mean that there is an incorrect voltage value detected from the main controller board. When this happen we say that the main controller is forcing the PSU to standby, sending the set in protect mode.In protect mode only

The PSU can be tested bridging the low voltage control lines that are turning the higher DC volts from PSU on.

The procedure to test the PSU is illustrated in the following article. I wrote the article for LCD, but the procedure is more or less the same on your plasma. Simply disregard the part on inverter (plasma work in a different way and have no inverter or backlight system) How to test an LCD TV or monitor PSU

Bridging the voltage lines is a repair suitable for an experienced technician. If you are a DIYer, better testing the resistors and components near to the faulty capacitors by reading Ohms to check if they have continuity. This operation is done with power not connected.

If you need to replace the whole board, here the part number: POWER SUPPLY UNIT LJ44-BLAH101C PHILIPS. The part is temporarily out of stock, and may be available ordering from Philips.

Here the service manual:
PHILIPS Chassis EP1.1U AA Service Manual.

Posted on May 06, 2010

  • Dan Zukowski Jun 14, 2011

    what was the issue, did a PSU resolve the problem? I have one with the same simptoms.

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I have a Philips 42pf5321d/37 that won't turn on.


send me a email sonny@tvcircuitboards.com and I can assist you with troubleshooting it to determine whats happening with the set.

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The tv will not turn on it starts blinking red lights, then when the power supply is removed in about five minutes. The power supply is plugged in and turns on. The model number is 42PF7321D/37


I had a similar problem with my 42 in Philips LCD HDTV.


Here was the problem. My Power Supply Board had several bad capacitors. I opened my TV (warranty was expired of course) and found four bulged capacitors on the PSB. Many major electronics companies Philips/Magnavox, Sony, Panasonic, and others were sold capacitors that failed in 2-5 years instead of 10-20. The capacitors fail prematurely due to a lack of preservatives. Unfortunately, they were installed in all sorts of devices and cause a wide range of failure problems.


Here are some options for you.


1. Have it fixed by a professional $$$$$$$??????? (Is it under warranty?)

Remember, TVs CONTAIN HIGH VOLTAGE AND CAN KILL YOU! Do this at your own risk.

2. Open your TV and find PSB. (The board that the power cord plugs into) Check for faulty caps. If you find some (bulged or leaking) bad caps replace the entire board. The entire board costs around $250 right now because they are in high demand right now. They can be found online. I would definitely shop around though.


3. Remove and then replace individual faulty caps. This takes some soldering skill.

Caps are inexpensive and if you can take care of it yourself it will save you hundreds.


This may be your problem. If you determine that it might be.

I have a Tip/How TO tutorial on this site that may also help. It gives step by step instructions for replacing caps on PSB #715t2432-2. If this is your board you are in luck. Here is the Link: Fixing the Philips Turns/shuts off on its own problem. I

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1 Answer

When I power on my 42PF7321D/37 Philips Plasma TV the green LED comes on then turne into a flashing red LED. Flashes 4 times then space then four times. TV will not turn on.


Hello,

Ur power supply board is dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get ur tv power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.


Hope this helpout........


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