Question about Philips Magnavox 42MF521D/37 Television

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Magnavox model TS2768C101

Tv was working fine, unpluged cable from back with tv left on and then unpluged tv. When I went to turn tv back on it clicks on and back off. It seems to cycle approx. every ten seconds if you hold the putton in to power on and power off. It also tries to power up on any of the keys ( menu, volume, channel keys)
I have unpluged tv and waited and tried to power it up with no luck.

my tv was fine, turned it off, won't turn on at all. unplugging, waiting the time then plugging in again, doesn't make any difference. is there a button or something?

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6 Suggested Answers

SOURCE: Philips 42PF5320 plasma - unplugged and plugged in. wont turn on

This is a common problem on these plasma TV's. The problemresides in the high voltage boards known as the X and Y Sustainboards.. You can purchase them here for a very reasonable price:

The above link is to a Y-SUS board. The X-Sus board is often the 2nd cause of failure and can be found here:

Totest which board is failing, you need to check voltage input to theYSUS board first... Input should be 120V from Power supply, outputshould be above 250V.. Do this test with XSUS disconnected. IF 250+Vexists, then XSUS is damaged. If not, then the YSUS is the faulty part.

Posted on Oct 16, 2009

  • 1187 Answers

SOURCE: My 50PFP5332D/37 Philips plasma tv stopped

You may need to replace the Y-buffer to say the least. And if this is not the problem, you will need to replace theY-main board. If the Y-main board is bad you will also change the Y-buffer. Please see a Philips Tech!!!

Posted on Dec 25, 2009

  • 5 Answers

SOURCE: 42"doesn't turn on

if u care to sell the stand that goes with this tv, please email me at

Posted on Jan 05, 2010

  • 616 Answers

SOURCE: My Philips Magnavox 50MF231D/37 won't turn on.

The tv needs the power supply serviced, most likely ( 2) 3300u 10v capacitors. (they can be spotted because they will bulge on top) best to have a pro replace them, however since I am telling you what the problem is try to negotiate a fair price - no more than $150 dollars. you can try to do it yourself but you will need soldering equipment and some level of electronics knowledge. good luck.

Posted on Sep 14, 2010

  • 117 Answers

SOURCE: I have a 32" Magnavox tv purchased in 2005, model

dear User,

pls be informed that supply capacitor are weak.

kindly change the supply capacitor

Posted on Feb 26, 2011

  • 1591 Answers

SOURCE: I have the Philips 50

There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both.
Any caps in these sections that look bulged at the top, or bulged/leaking at the bottom need to be replaced.
If you repeatedly turn it on, it may eventually stay on, but every time you turn it off, the TV will get harder and harder to start up until one day it just won't.
Sometimes you have to do the opposite to start it up and unplug it for 5 mins, then try.

If you are handy with a soldering iron and can identify the power supply and inverter / FM section for the backlights, an inexpensive handful of capacitors will likely fix you right up.
Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V or 25V or even a 50V, but don't replace a 680uF cap with a 500uF or a 1000uF (unless you are positive it's only doing ripple filtering, and even then, you should go OVER, not under the uF rating).

Most of the caps that go are 10V 1000uF or 3300uF.

I found some great videos of the procedure (for many Samsungs with the same issue) on youtube.

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(do not delete)
As you can see, this issue spans plasma TVs, as well as large and small LCD TVs and monitors.
The parts are cheap, and skill required is minimal.

Posted on Mar 25, 2011

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I have a 32" Magnavox tv purchased in 2005, model

dear User,

pls be informed that supply capacitor are weak.

kindly change the supply capacitor

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Jan 13, 2010 | Philips Magnavox 42MF521D/37 Television

1 Answer

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Most likely you will have to replace the power supply. It is a very common problem especially in newer electronics. You can test it with voltmeter or multi-tester. They tend to get worn capacitor inside the power supply due to cheaper parts

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Call the cable co. If your getting the cable setup screen from the tv...Its getting that signal from the box...The tv is fine.

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