Sounds like there is a Power Supply problem. Maybe a common problem of the Electrolitics drying up. This can also cause the Power Supply to short circuit and resistors can go Open Circuit. Get a Technician to look at it.
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Is this a tube tv?IF it is the Flyback tranformer have a little still bar tranformer hight current volt make that noise take off the tv cover put some glue on the little steal bar should stop the noise or lower it very good.
Are you really sure , your set has video? How dark is it ? As if really nothing visible? Am, sure you can hear sounds. You can adjust the brightness + button to increase the brightness. But if nothing happens , you have problem with your TV set. The problem might be in the Video section. Please let an expert technician to check it. Please don't do it by yourself, it's risky.
Please send feedback whatever comes up. So we can help you further in the future.
if your handy and know your way around , open the TV to get inside and do a visual check for any DRY SOLDER on the PC board .specially around the POWER SUPPLY AREA and the
horizontal output area , those area gets a little heat on the board . do some REsoldering. if you can take out the PC Board
and do the inspection , will be much better . hope this been helpful. good luck
Sounds like the colorwheel (used in DLP projection sets with a single DLP panel) is going bad, either the wheel itself or the bearings on the motor driving the wheel are starting to fail. I would recommend getting a professional to service the TV set.
Loss of picture and you still have audio shouldn't bee too difficult or expensive.. Personally I'd recommend repairing it... But take it in yourself, don't pay pickup and delivery and ask for a written estimate first..
You may have a problem with the switching power supply or the high voltage power supply. Because these two power supplies output hazardous voltages I would suggest that you take this to a shop for repairs.
Check first if theres a speaker cutoff in the menu of the set or the back of the set. Next see if theres a headphone jack and plug in a set of phones to see if you get sound. If you do a connection on the jack is bad. if you put youe ear right next to the speaker and hear a little background noise or a little sound then its probably in the volume control curcuit. if you hear nothing at all its the audio output IC or the speaker itself is defective. Good Luck