Question about RCA HDLP50W151 50" Rear Projection HDTV

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I replaced the lamp in this about a month ago and it has been working great. About a week ago I noticed that it was taking about 5 minuts for the picture to come on, all the meantime I could hear the sound. Now the picture will not come on at all but the sound is there. I have looked at the lamp it looks fine also I can look through the back and see the lamp come on for about 2 seconds and then back off. Anyone have any advice. Thanks

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Please check the small caps that run off of the power source that goes to your video in put, feel them with your hand, the bad ones should feel warm which is then shorting the current from passing thru to your supply branch, trace your schematic and you will see the caps that are on that branch, I had the same problem took five min. for picture to pop up. sound played good.

Posted on Jul 13, 2007

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Check the soldering for the lamp that was replaced the soldering could be poor and needs to resoldered over.if that does not solve the problem the video module needs to be replaced.good luck.

Posted on Apr 14, 2007


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Red light on no picture will work fine after several minutes

There is a list of things you need to check, but offhand I'd say that the 5 volt line is low and probably right on the"edge", which is why it works sometimes and not others take a look at this list:
Cause #1
1. (Lamp may light and go out) suspect bad lamp part # 915P020010 2. Check for
12-volts DC at J-9 connector pin 4 on the Engine Driver PCB, if missing check
for an open F9A09 on the Power PCB, if it is open replace F9A09 part #
283P127060 and the Light Engine part # 939P977010 3. (Lamp may light and go out)
Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if
low or missing check C9A37 and C9A38 both 3300 UFD 10 V part # 181P732040 on the
Power PCB (part # 930B921002) 4. At power on the lamp turns on and off three
times and then the unit shuts down with a red lamp LED (lamp error). Replace the
Light Engine part # 939P977010 5. Lamp enable line at J14 pin 6 does not switch
to 5 volts after turn on, 12 and 5 volt supplies are good. Suspect the Light
Engine part # 939P977010 6. Lamp enable line at connector J14 pin 6 on the
Engine Driver PCB switches to 5 volts after turn on and does go to 0-volts (low)
after 5 seconds, 12 and 5 volt supplies are good. Suspect the Lamp Power PCB
(ballast) part # 939P978010 7. Lamp enable line at connector J14 pin 6 on the
Engine Driver PCB switches to 5 volts after turn on but does not go back to 0-
volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Light
Engine part # 939P977010

I would say try #3 first, the two caps on the pwer supply board. A couple of warnings: as always, unplug the unit before servicing. The power supply is located on the left side, if you behind the unit. It is in a shielded box and the shield has VERY SHARP EDGES so use care when you try to open it or you will slice your fingers.
Please be sure to rate this solution. Thanks!

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I had the same issue. Replaced the lamp and now mine is working. Normally this is a sign that the bulb is out, however - I would say now that either:
1. Your lamp is defective.  2. The balast in your TV is defective. 
I would check out - they can help.

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My mom and dad had this problem, after replacing the bulb everything is working great again.

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