Question about Philips Magnavox 51MP392H Rear Projection Television

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Tv overheats in 15 mins

Tv overheats in short time, there is nothing around the set which would cause overheating. I have to run a fan on the side of the tv just to watch a program.

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It initially looks like you will need to remove the back panel. Using a large can of condensed air from a place like radio shack.
Spray the air from the top downward & do not!!! use a vacuum cleaner because it causes static electricity and will fry the TV.
You can have it ready to get the dust up tho.
How close is it from the wall? Is there any "vents" nearby?

Posted on Feb 18, 2009

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Gateway ZX 4800 has green haze over the screen sometimes it goes now its still there

make this test and fix it. God bless you


Temperature is a common reason why many Rear-projection TVs do not perform well when they get to hot. You may start to see your TV shutting down automatically when it overheats. Here are a couple of things you can do to prevent overheating. First make certain any TV ventilation ports are free and clear of debris and dust. Second make sure the TV has enough room for airflow. Third, the temperature in the room should be around 72 degrees. Due to the high degree of heat generated by a rear-projection TVs, it is not advisable to watch TV on a hot days when you don't run the air condition. This could cause damage to your TV.

Configuration Problems

Improperly configuring TV setting can cause problems. Verify the TV settings are set correctly. First, brightness and contrast should not be set to high or to low because this can cause poor picture images. Second, adjust the color on the TV when the picture displays colors poorly. Third, if you are having sound issues then check to make sure the volume is not muted or turn down all the way.

Nov 04, 2013 | Projection Televisions

2 Answers



It probably has a fault.But try this.Disconnect all speakers and inputs and try again.If that works reconnect the speakers A PAIR AT a Time.That should lead to the fault.If that still shuts down.

the set is going into protection mode. This is caused when ever one of the many sections of the tv has a shorted circuit. The increase in current is detected by the protection circuit and it flies into action by turning OFF the ON relay.

Most often, but not always, it is either the high voltage section or one of the deflection amplifiers. But can be the power supply, the audio amplifier or voltage regulators, etc.


Feb 19, 2008 | Samsung HLN5065W 50" Rear Projection...

1 Answer

My toshiba tp50h15 shuts off after 5 to 15 min of use


It's the problem of overheating in the power supply board of the TV.on the power supply board of the tv there are few capacitors and IC.any of this ic is got short or may be due to this when you start the TV the current passes from electric outlet to the power supply board of TV.but when the current passes from that weak/faulty part at that time current gets stopped or slow and the board overheats and TV shuts off. this is a common problem faced by many other users too.the possible option to solve this issue is to check the power supply board by a meter and continuity tester and replace the faulty component on the board which is short due to which power supply board is getting overheated.its bit technical job but yes its not at all a costly repair to do or get it done by the technician. for required parts it can be easily available from local electronic hardware shop.
This will help.

Jun 14, 2011 | Toshiba TP50H50 50" Rear Projection...

1 Answer

I just replaced the lamp in my tv, it will work fine for 10-15 minutes, after that the picture will start to flicker and then just go out completley and th lamp light will blink on the tv set, what could...

My 50HM66 did the same thing. Try putting a fan to the side of the tv so it blows cool air around the back. I also removed lamp and vaccuumed as best I could. I think this is an overheating issue with the tv.

Sep 03, 2010 | Toshiba 50HM66 52" Television

1 Answer

TV cuts itself off

It may be overheating. Check the temperature with your hand by placing it over the fans/slots to feel for any excessive heat. If it won't turn back on until it cools, then it's a heat issue. You could help that out by using fans to circulate the air around the unit, trying to keep it cool by moving the hot air released from it and pulling in cooler air. Other than that, there may be a short somewhere, or maybe even a broken fan.

Jun 05, 2010 | Panasonic PT-51HX41 51" Rear Projection...

1 Answer

I have a sony projection tv kds-55a3000 the green light blinks with 2 short buzzes and the tv dont turn on but the fan starts to run.

Straightv from the SONY service manual

  • 2 times, Diagnosis: B overcurrent (OCP). Possible causes: H. OUT (Q8024) is shorted. (D board), +B PWM (Q8035, 8038) is shorted. (D board) Symptoms of the problem: Power does not come on, Load on power line is shorted.

  • This is not DIY stuff and is dangerous to play around with. I suggest you get a tech to fix it rather than opening it up and doing it yourself. Also dont keep turning it on in the hope it will start. It is more likely to start a fire if it begins to overheat from being constantly started and left plugged in.UNPLUG it

    Please rate my help++++Thanks for using FIXYA

    May 07, 2010 | Sony KP-51HW40 51" Rear Projection...

    1 Answer

    Tv switches off after 5 mins

    There might be three or more reasons for this:
    1) The sleep timer may be on causing the TV to turn off after a preset time.
    2) If sleep timer is on and no signal from the remote is received for a preset time (Samsung: 15 minutes) the tv will turn itself off.
    3) The TV may have been turned on automaticaly with "On Timer". If so, and no signal is received for a preset time (Samsung: 3 hours) the tv will turn itself off.
    4) A fan is not working or a vent is blocked causing the TV to overheat and turn off.
    For 1) thru 3), go to the "setup" menu and make sure "sleep timer" and "On Timer" are turned off.

    May 09, 2009 | Projection Televisions

    1 Answer


    Is the unit free of dust and debris from dust? If its overheating there are may factors that play in this

    1. fan spinning but not enought RPM rotations per min ( not fast enough)
    2. room temp
    3. dust

    other then that some capictors must have exploded inside withc will cause a overheat.

    Apr 22, 2009 | Samsung HLR5064W DLP Projection TV

    1 Answer


    yes open it up get dust out run small fans in nit see how long it stays on

    Sep 15, 2008 | RCA HD52W56 52" Rear Projection HDTV

    1 Answer

    Error 37

    HELLO. the fist this is turn on the set and just let it do it's own thing.!!! for around 7mins to 15 min's and see what happen's and then tell me ok. let me know ok

    Aug 18, 2008 | Mitsubishi WD-52525 52" Rear Projection...

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