WHEN I TURN IT ON THE JVC SYMBOL SHOWS BUT THEN IT GOES BLANK AND I CAN ONLY HEAR WHATS ON
Check your HDMI cable. Plug it into another hdmi port or swap the cable all together.
Mine its blank with no pictures but the sound is there when i inset USB or DVD its playing fine but not in dstv or normal channels. its a samsang plasma
Check the picture board or the back light if all bolbs are well working
SOURCE: picture goes blank
What type of TV is this unit? An LCD or Plasma?
If it's an LCD, take a close look at the screen with a Flashlight and see if you can see some sort of picture (Almost like a ghost of an image). If this is the case, the backlight has failed.
If it's a plasma unit, you're probably looking at a power supply issue to the panel.
SOURCE: Screen is blank with sound working
i just fixed mine by doing this. on the remote there should be a button that says f. hold down the f button then press mute and that should work it did for me
SOURCE: my tv has sound but no picture
If you haven't bricked this unit yet, or paid Syntax/Olevia's highway-robbery price to fix it (and pay STUPID prices to ship it to and fro), there is hope. Despite what Syntax and others say, it IS a replace-able part that can help get your TV to last at least another 12-24 months. During that time, you can save for a new, more reliable and reputable TV.
http://www.lcdparts.net/LCDTVInverterdetail.aspx?InverterOriginal=V144-001
This is a well-known (at least those of us who had ours fail before yours) symptom of a bad backlight power inverter, which, for the LT30HV is a pain in the arse to get to (it's behind the main power distribution board and motherboard w/Pixelworks chip). If you can take apart a tower computer and install I/O cards, you can do this. These parts are made cheaply in China with 64 weld points that fail 100% of the time - and many other 'name' brand LCD TVs use this exact same CCFL backlight inverter. I'm working on posting the procedure somewhere on the net. The procedure shown in MoniServ's website is on a Kreisen set, which looks FAR more easily serviced than the LT30HV.
Good luck,
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: TURN ON TV, SHOWS PICTURE FOR A SECOND, THEN THE
there is a bad capacitor in the power board
The Can shaped little device will have a domed or puffed up top on it the value is printed on the side you can , or have someone replace the cap and you should be all set
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