I have a JVC 40 inch LCD lt-40dg20j TV. It was on working fine then just went off. There is no power lights even coming on. What can it be.??

SOURCE: JVC LCD TV LT-42X688-powers on, blank screen. no picture,no sound

You most definately have bad capacitors in the power supply. try and get it repaired as soon as possible, not an expensive repair that iv'e seen.

SOURCE: Emerson 32 inch LCD TV will not come on.

I'm sure you already checked the outlet and the surge protector bar. It's lame how the warranty only last a year on this TV.

If your lucky, it will be just the fuse that need to be replaced. It will look like a little glass tube with metal caps on the ends. Radio Shack or an Electronic supply store will have the fuse. Just show them the fuse and they should match up the type and size. It needs to be 4amps and 125volts fuse.

If this doesn't work, you'll need to replace is the power supply board. The board# is BA71F0F01042. Your power supply board should have the same number on the lower right side of this board.

The board is hard to find right now. Only three places I know of to find it.
Ebay,
Discount-Merchant.com,
and Shopjimmy.com
Sadly, nobody has them in stock.
I wish I had a extra board to sell you, because I know how to repair the power supply. I have the schematics diagrams and part# for the pieces on the board.
If you ever come across a replacement board, let me know. I would like to buy your old board. Here's my e-mail, [email protected]

SOURCE: Newer Jvc tv wont turn on

1. hold the [vol-] and [menu] button.
2. while holding those, press the [power] button and let go of the [power]button only
3. wait 5 seconds then let go of [vol-] and [menu]
4. wait for a while(approx 30secs).....do you get a picture

This works for the JVC models that end in "9" and end in "0"

SOURCE: JVC LCD TV LT-42X688-powers on, blank screen. no picture,no sound

Hi , I have the same problem with my LT-42X688,so i called the service of my extended warranty provider . the TV technician just left and told me the motherboard is the problem. he said its the third one this week he has seen with the same symptoms. he ordered the motherboard and i've got to wait 5 to 7 work days before the part will be in . I will keep you posted when the guy will return.

SOURCE: I have a JVC LT-42X579 TV. I got home tonight and

This is common problem of the failure of power supply board inside TV. You need technician to figure out this problem.