Question about Philips 42FD9932 42 in. Plasma Television

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My Philips plasma 42PF9966/37 turns on with blue light and stays on just a few seconds and turns off. Is there a short or would you know what sort of problem I have.

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Several errors possible.
These sets have a very complicated power supply with a complicated error detection circuit.If you need the service manual please contact me.

Posted on Nov 12, 2009

  • leadking222
    leadking222 Jan 10, 2013

    Can you help me figure out what this issue is. I am having the same trouble....



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My Pioneer Plasma tv turns on for a few seconds and makes a noise then turns off

set is in shutdown as it detects either a missing voltage or a short somewhere----repair in these sets is trial and error---check a few things and then begin replacing boards----an expensive situation and Pioneer is not exactly easy to get parts from on some models......

Mar 20, 2012 | Pioneer Televison & Video

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This is a plasma unit and philips plasma's are nortorious for bad power supplys, your problem may very well be the power suppy in the television, it is possible you blew a low B+ fuse on the power supply. There is also a issue with the Y-sustain board failing in this model, If you open the back and looking at the unit from the rear the y board is on the left side of the unit and the PS is in the center. disconnect the Y-sustain power plug from the power supply and turn on the unit if the unit stays on with no red light then the y board is bad. it does the same then replace the Power Supply.

Mar 10, 2011 | Philips 50PFP5332D 50 in. Plasma...

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I have had my TV-- a 42" Philips plasma-- for

it can be a poor contact or puffed capacitor in the power supply board

Dec 06, 2010 | Philips 42PFP5332D 42 in. Plasma...

2 Answers

My 50 inch philips plasma tv wont come on. all it does when you turn on the power is that the blue light comes on like usual and you hear a relay click and then a few seconds later you hear a relay clickin...

There are a few common gotchas for all plasma TVs:

Most commonly, a sustain board overheats and burns out; sometimes that prevents the TV from powering and sometimes it does not.
Unfortunately I don't know enough about your particular model to tell in which category it falls.

Second, the power board either breaks too (sometimes as a result of a sustain defection) or filter capacitors on it dry out and prevent the board from powering on properly. This, in turn, is detected by the protection circuits on the power board itself and treated as a short circuit, thus shutting down the board to prevent further damage.

In my experience 80% of the time the problem you describe is caused by burned ZSUS board and 20% are due to defect power board.

As I said earlier when a sustain burns out it sometimes takes down the power as well. Which is to say do not presume that just one board has gone bad.

One of these days I am planning to post a DIY troubleshooting guide for plasma TVs at my site .

It's easier than many people think.

For example in your case I'd try to power off the ZSUS board - the one on the right side of the TV when you watch from the back - and turn it on again. If it powers on then the problem is in the ZSUS board.

In fact, there are quite a few such guides circulating around the net.

The problem ,of course, is that it takes time to understand and apply them properly.

Unless you have a lot of time to kill or a desire to enter the field of TV repairs it's usually better to just pay off a good technician.

Developing the qualities to find a good specialist is a challenge well worth the time and will pay many times in life.

The same can not be said very safely for the qualities of repairing plasma TVs :-)

Jan 13, 2010 | Philips 42FD9932 42 in. Plasma Television

2 Answers

I have a Philips 42PF9630A/32 Plasma TV, red led blinks 7 times

No,body can cofirm u have to troubleshoot change the boards to know the problem.

Oct 22, 2009 | Philips 42PF7220A 42 in. Plasma Television

1 Answer

My TV won't stay on until it's warm?

have your unit power supply check, maybe some cold solder or leaky capacitor is the culprit.

Aug 01, 2009 | Philips 42PFP5332D 42 in. Plasma...

2 Answers

42PF9956/37 SHUTSDOWN...

Ok. I got my tv back on.
I pulled off the back cover and found the relay that was clicking.
I have two blue relays next to each other that click when the power is pushed.
I placed a hair dryer over the relays for about a minute.
Once heated up, it only took 4 tries to get the TV to stay on.

Jan 03, 2008 | Philips 42PF9956 42 in. HD-Ready Plasma...

2 Answers

No picture

btw for anyone experiencing these problems with the infamous "is-lcdtv32" byd:sign is the same manufacuterer as insignia, its the same company with a different sticker. i know this isnt a solution, but parts for all discontinued insignia';s can be purchased thru byd:sigh(by design). hope this helps .

Oct 06, 2007 | byD sign d:4232 42 in. HD-Ready Plasma...

1 Answer

Philips 42pf9956/37

when the light goes red it should be blinking a two digit code and repeat itself continuosly. slow blinks are the first digit and fast blinks are the second digit

Sep 25, 2007 | Philips 42FD9954 42 in. Plasma HDTV

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