Question about RCA HD50LPW42 50" Rear Projection HDTV

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No picture, installed new lamp but it is not getting voltage

I replaced the lamp because it was bad but can't get the picture to come on. Checked for voltage where the lamp plugs in and there is none. Can this mean the ballast went out and that is what caused the lamp to fail?

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No can't check power out to high it is about 15,000 volts out put all you can do is is listen to ballast and see if you here a spark if not bad make sure you have the light door switch bypassed.

Posted on Nov 21, 2008

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I installed a new lamp and the tv is still blinking saying the lamp is bad. There is no picture.

its most likely the ballast which is causing the issue. The ballast is what provides the power source to light the lamp. You can get the ballast at and they can provide instructions on how to replace the ballast

Mar 31, 2013 | Mitsubishi WD-73733 73" HDTV

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I replaced my bulb & it still blinking& the bulb will not light. And I made sure the switch in the back was up! Help,!

Check to make sure it is getting voltage from the ballast and if as I suspect has a color wheel that it is intact--remove lamp and look at it.

Apr 02, 2012 | Projection Televisions

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When tv is turned on got flickering picture. Checked bulb and bulb appears intact and in good condition. Bulb lights up for a second then shuts off then no picture. Any ideas? Mitsubishi wd52525 DLP

I suspect the B+ voltage on the power supply can't regulate the voltage needed for the lamps to run entirely. The B+ voltage regulator looks like a small black box with a tapered top. This is dangerous to replace so be careful. Once you get a new one installed this will fix the issue you are having.

Hope this helps :)

Mar 07, 2011 | Mitsubishi WD-52525 52" Rear Projection...

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No picture


If you are having sound but no picture, then there is most likely a problem with either the lamp of the television, the t-com board or there is a bad capacitor on the main panel of the television.

First check the lamp by unscrewing the television, some of these televisions have their lamp right under the television, by the control panel. So have it assessed to see if it is worn out or damaged, either ways, it needs replacement, but if it is intact, then you need to go further by checking the t-com board, this is located at the back of the television, under the main panel, have it checked also to see if it needs replacement.

If after checking them both and the problem does not seem to be from the lamp or t-com board, then you need to assess the main panel of the television for any bad capacitor, if there is any, then you need to replace it with a new one.

These are most likely causes of you not having picture with their solutions.

Make sure you unplug the television for about an hour or two, to dissipate the high voltage in the unit, also be very careful in order not to damage any other part in the unit. If you are not familiar with such activities, i will strongly advice you seek professional assistance from a repairman.

Take care and good luck

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1 Answer

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you cant - unless you have another tv to test it in. May be a ballast or the cooling fan for the lamp is not working.

Feb 02, 2010 | Projection Televisions

1 Answer

Mitsubishi WD-65733 no picture, electrical buzzes in series

What it sound's like is that the lamp ballast is the problem. Buzzing sounds like when the power is first brought to the ballast it has to ramp up the voltage to get the lamp to light, then the voltage drops back down when the lamp is lit. Sounds like the lamp ballast isn't ramping up the voltage the way it should. May have to replace it. A good service shop would be able to do this for you.
A/V Media Guy

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New bulb is just fine.
3 blink shows that lamp cover after replacement of bulb in TV is not fixed properly or not seated well in its position.
Put new bulb and carefully place back lamp cover in its position because lamp cover will press tinny safety switch inside that will send signal to system control of TV that lamp is installed properly.
Turn On TV and get vivid picture of Sony.

Oct 17, 2009 | Sony Grand WEGA KF50WE610 50" Rear...

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I had the same problem with my 52". I had the error code of 34(lamp abnormal). I put a lamp in that I knew was good and changed the ballast with one that I knew was good and had 8 caps replaced on the power board(they where not puffed but did them anyways) and still nothing. light came on for 3 seconds and went off again and tv shut down with a red status light. I did some reading on other web sites and found that if the color wheel is bad the tv will not work. I found a light engine on ebay for a 100 bucks used and installed that and now it works perfect.

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