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Rick williams
Rick williams, Technician
Category: TV
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rca dlp hdtv. no picture, has sound. replaced bulb 6 weeks

Resolved Question:

rca dlp hdtv. no picture, has sound. replaced bulb 6 weeks ago. Occasionally there will be a picture, and very good, but this is only after tv being off all night or after a hard reset.
Submitted: 7 years ago.
Category: TV
Expert:  Rick williams replied 7 years ago.
do this test Were the wire is that runs from the ballast to the power supply, make sure it reads around 300vdc if it doesn't you need a power supply if it does you need A BALLAST. You can make sure the capacitors close to the connector are flat on the top if not you may have bad capacitors. It will be easy to see if the power supply and ballast has bad capacitors they will not be as flat on the top as the good ones, this is the problem. Also intermitting shut downs, This can be caused by the lamp switch, make sure switch is in the down position and the thermostat which is on top of the lamp housing, both can be tested buy shorting them out and running TV if any are bad Exchange them and you will be ok,
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Customer: replied 7 years ago.
hmmm. This seems to be an intermit problem. I turned the TV on this morning and no problem, perfect picture. Then later on, no picture, but had sound. Would a power supply or ballast be either good or bad, no in between?
Expert:  Rick williams replied 7 years ago.
Of course,, well both have a in between,, also fans you have to be very observant with intermitting problems,, and when it is in this state you should check the ballast for 300vdc..