Question about Philips Magnavox 42MF521D/37 Television

2 Answers

Phillips 42PFL5432D/37 tv turns on but turns off on its own constantly for no reason. it will turn on without a problem, but then a short time and its off

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

This sounds like a problem with the Small Signal Board (SSB). This is the main circuit board with RCA and HDMI jacks that you connect all your devices to.

There are about 5 surface mount 220uF capacitors on the lower left corner of the circuit board (as viewed from the rear). Replace these with same capacity and voltage rating and you should fine. They can be caps with regular leads. they do not need to be surface mount types.

One way to check if these caps are the problem is to warm the area with a hair dryer and see if this turns on the TV or keeps it on longer.

Posted on Apr 24, 2012

  • Level 1:

    An expert who has achieved level 1.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 4 Answers

Most likely the Power Supply has bad capacitors. check out for info. Someone else on there has the same LCD.

Posted on Nov 23, 2010

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Philips 42pfl5432d/37 tv chirps when power is on

Usually stems from a short on the power supply board. I have a 37MF337B/37 37" that had the same problem. Turned out the set had 5 leaky capacitors and a shorted diode on the power supply board.

Jan 10, 2013 | Philips Televison & Video

1 Answer

I have a 42 inch LCD Phillips (42PFL5432D/37). The TV will not power up and the power button is flashing red and is making a chirping sound. Please Help.

I'm having the exact same problem with the exact same TV... capacitors are all good. I suspect a diode. will report back

Dec 03, 2010 | Televison & Video

1 Answer

Model #42PFL5432D/37 Not receiving power? when

i was a tv engineer for many years quite a while back now and when a led is flasing or pulsing it usualy means the tv's power supply is in over current mode wherebye it shuts down to prevent any further damage due to a part of the circuitry drawing excess current, high voltage transformer etc, you need to get a techie in, sorry.

Nov 03, 2010 | Philips Televison & Video

2 Answers

Philips lcd tv 42pfl5432d/37 no picture

based on what you clarified and my experience I'd bet the problem is in one of the inverters, most likely the main inverter.

Look at the board part number - it's usually imprinted on the board itself - and look on eBay or Google for it.

Another way to go about it is to type in the model number (usually without /37) followed by the word "inverter", e.g. "42pfl5432d inverter".

My search yielded result board number VIT70023.80 and from there you start searching for this on eBay...find a reputable seller (like me, except I don't think I have it) and buy it.

It might be the slave inverter, it might be the master, but from what you describe it's more likely the master.

It's possible to nail it down, but it will require multimeter and some extra time.

Hope that helps!

Nov 15, 2009 | Philips Televison & Video

1 Answer

Power button will not come on either manually or with remote. Cable is working and power is on the circuit.

I have a Phillips. If you have a menu remote press tv. I panicked when that happened to me. I have RR and if you press the yellow A
and ctr at the top left for about 30 seconds should reset remote.

May 24, 2009 | Philips Televison & Video

1 Answer

No audio from cable through surround sound

you have to go to the setup for the TV audio and change it to audio out, not speakers.

May 07, 2009 | Philips Televison & Video

1 Answer

Phillips hdtv model 30pw9110d/37 won't turn on

Common short the cover cap over the video & sound boards short out if you remove it the cap only (shield metal) it usually will fix this

Apr 28, 2009 | Mitsubishi WT-46805 46" Rear Projection...

1 Answer

Phillips Magnavox Proj. TV only makes cyclic chirping sound

Most common reason is shorted convergence chips. Goto the site and get their "chirping set" repair kit. 

Feb 01, 2009 | Philips Magnavox 9P6034C 60" Rear...

Not finding what you are looking for?
Philips Magnavox 42MF521D/37 Television Logo

481 people viewed this question

Ask a Question

Usually answered in minutes!

Top Philips Televison & Video Experts

The Knight
The Knight

Level 3 Expert

73619 Answers

matt martin
matt martin

Level 3 Expert

1208 Answers

Jaime Hernandez

Level 3 Expert

2315 Answers

Are you a Philips Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides