Question about Mitsubishi WT-42311 42" Rear Projection Television

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Will not stay on

The TV all of a sudden one night just turned itself off .When you turn the power on it comes on for about 3 seconds then it turns itself off. We call Mitsubshi and told us to turn off for 20 min and turn on again but that didn't work. Did the bulb go out? Any suggestions?

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Re: Will not stay on

Do you have any sound? If not, open the panel and press the menu and input buttons and the same time, count to three and then there will be a code flashed,  it will flash a t least once followed by a pause and then a nother set of flashes let me know

Posted on Oct 11, 2007

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Samsung TV model LN32A450C1DXZA, after turning the TV on it will turn itself off shortly after and then turn itself back on shortly thereafter. Then it repeats that several times before staying on.

Hi there,

If the tv is still under warranty, this can be repaired at no charge.

However, if not under warranty, you will need to have the CAPACITORS on the main power supply circuit board tested (or replaced).

The capacitors responsible for the power supply can sometimes fail - open the back panel. If the capacitors on the main power supply board look too fat, or signs of burning near the solder joints, then you've found the problem.

Hope this helps.



Feb 01, 2013 | Samsung LE Projection Televisions

1 Answer

My tv, when plugged in just keeps turning itself on and off in intervals of about 3 seconds. It doesn't give time for anything to come up on the screen at all.

Problem is in standby power supply or microprocessor area---not the do it yourself repair and likely not economical to repair due to age and brand of set.

Sep 01, 2012 | Philips 60PP9352 60" Rear Projection...

1 Answer

My tv turned off by itself last night and now will not turn on. It stays on for about 3 seconds with no picture and then turns off by itself.

When the power light comes on and then goes out, on the front of the set press both the MENU and INPUT buttons at the same time and hold them both in for at least 5 seconds and then release both buttons.

The power light will blink a 2 digit error code and repeat it at least 5 times.

The most common error will be 2 blinks, 2 blinks- a pause and then it will repeat it for a total of at least 5 times.

To get it to repeat this--you have to unplug the set, try to turn it on again and repeat the process.

The error codes are to try to narrow down where the problem is.
If this told you something you did not know rate this solution as very helpful as I do this here for free.

Let me know what error code is found and I will tell you what it means.


Sep 21, 2010 | Mitsubishi WT-42313 42" Rear Projection...

1 Answer

Last night the set just turned off by itself. When I try to power on, the power light comes on for a second and then it shuts itself off again.

I am having this exact problem. The TV turned off by itself and now when I try to turn it on, the power light stays on for a sec and goes of with a click sound.

Any TV experts who can HELP?

Apr 20, 2010 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

RCA Colortrak plus. Model# F32672SB Serial # 807560570 Chassis # CTC187CJ3 Manufacture Date Feb 1998 Service # F32672SBFM3 4/21/08- TV worked fine last night. This morning worked for about an hour. ...

It's probably a cracked solder joint in the power supply / horizonal drive stages. As the unit heats up the joint is seperating and breaking connection. It could also be a component failing when it gets hot. Usually the voltage regulator or Horizonal Output Transistor (both mount to heat sinks).

If you know how to solder and want to tinker, unplug the set for a couple days (to let the power capacitors discharge) and resolder and crystalized it cracked joints on the board(s) where the power stages, and flyback transformer are located.

If you decide to operate the set with the back off, please be careful. The high voltage on a TV can be 30,000+ volts.

Hope that helps,


Apr 21, 2008 | Projection Televisions

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Tv won't stay on

i have seen this before and it may be the front power button being stuck and when your remote turns it on the stuck button turns it back off again. I have an older mitsubishi that will not boot up right sometimes and i have to unplug it and plug it back in fot it to come on. I used to pick up broken tv and fix the power buton and resell them

Mar 27, 2008 | Projection Televisions

1 Answer

Power won't stay on

What does the light blink? Also look on the printed circuit boards right below the picture tubes and see if there is any fluid leaking on them. These are the first things we need to know.

Sep 12, 2007 | Hitachi 60UX58B 60" Rear Projection...

1 Answer

Turns off after a few seconds

The unit is going in to shutdown. There is a short in the unit. My guess would be the HOT and or Flyback are bad.

Jan 05, 2007 | Panasonic PT-47WX51 47" Rear Projection...

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