Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
https://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary. /
SOURCE: JVC - XV-F80 DVD Player
Either the disc or the player likely need a good cleaning. Clean the disc with a soft cloth, clean the player with a good cleaner disc.
SOURCE: JVC LT-42E488. No picture. JVC logo comes up for a few seconds.
A firmware update might fix it. Call an authorized servicer, explain the symptom.
SOURCE: my jvc HD-52G786 TV channel will freeze then
most likley you need to see ure dealer about that as it cost to buy the program and the cord just to do an update every 2yrs
SOURCE: I have a lip sync problem with a JVC LT-19DD30J LCD TV
Hi!
That's a clear indication that you have a bad power supply in your TV.
If
you know how to DiY...I suggest you open your TV. Locate the power
supply section, it is where the end of the power plug is connected.
Replace all blown or bulge or leaked capacitors with same value. That
will fix your TV problem.
The hardest part is to disassembling your TV cover, cause you will need to pry off the snap in lock at the edge of your TV.
Power supply board should look like this. Examine the capacitors in the board
After replacing blown capacitors...it should work again.
Things you will need.
1. A plastic flat end screw or any object with flat ends....to fry off the cover
2. Soldering iron.
3. Soldering lead
4. Soldering pump.
5. Flat and Philip Screw
6. Replacement capacitors (of same value with the blown one) that you can buy to any electronics store.
Hope it helps
SOURCE: JVC LT-37XM48 Black Screen
tried to check first the inverter board and the screen back light which may have dry joint connector.
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