I have a problem in power supply on a jvc wide screen projection tv. it is not the power supply board.

Try a "hard reset" first by unplugging the set for 30 seconds. and if no help, you may have a problem with the SMPS power supply, it might have a bad capacitor or two by now. Worth repair if engine is good compared to a flat panel.

Tv have none of any kind of forces to causes like an objects or person hitting it to the tv LCD screen panel wright?Yes,than tv is good no problems there as tube wise.The tv power supply board it is the causes and the problems.That the board where the tv power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv power supply board for the replacement.

Hi,

The JVC 56G786 users manual will not give you a clear or specific answer about confirming bulb failure with the LED lamp or power indicators located on the front of the TV.

If the TV was operating normally for an extended period of time (months or years) and will not start, the problem is almost always bulb failure. If the "Lamp Replacement" warning previously appeared "On-Screen" and the TV will not start, bulb has failed.

The first step in a "no picture" situation with a JVC LCD Rear Projection TV is bulb replacement. There is no way to measure the bulb. Sometimes the bulb is visibly broken or damaged when it fails. Remove the lamp cage and have a look.

The JVC Lamp Gallery has all the JVC models and lamp numbers listed. There is also a link to DIY JVC bulb and lamp installation.

If a good bulb is installed correctly and the TV still does not start, you need a technician. There are no user serviceable parts other than the bulb. Failure of ballasts, power supply boards or controller boards is rare in these TVs.

easyab

Power supply board have the problems and the causes.It failing and not giving the tv the wright voltages to the rest of the tv anymore.That the board,where the board the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Tries tv unplug,replug it back like an hour later.The tv now it resetting itself back to the factory setting.The tv now,should work.Not,than the tv power supply board have problems and is the cause.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Start with a replacement Tcon board

Power supply board it dead.Replaced the power supply board will solved this problems.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

You need to replace the power supply board. The new ones have a bigger heat sink - obviously JVC knows about the problem because they made the new ones bigger. It cost $250 from JVC and I installed it myself - took about 3 hours to do. If you are not tech savvy call a repairman. Hope this helps.

check the power supply board remove the back cover just follow the power cable/plug in cord, remember unplug the tv set first you will see a fuse on the power supply board maybe is pop/open if no luck sell parts on ebay will get $$$....

Either a bad lamp or bad reciver board.If audio amp ic on reciver board shorts ,it will kill part of supply and lamp ballast will not turn on and fire lamp.