Acquired a JVC LT 32EX38 need help

[stinger381]

I got my hands on a JVC 32 inch LCD today that doesn't work. I plugged it in and turned it on to a JVC splash screen and then input modes and such then the picture fades away. I would not think that is power supply but I guess it could be. Haven't opened it up yet but will do that soon. Any ideas or suggestions of what I hold look for?

[Th3_uN1Qu3]

Re: Acquired a JVC LT 32EX38 need help

Does it fade away to black or white? Is the backlight still on after it fades? If light stays on, it could either be dirty LVDS cable, or bad Tcon board.

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

It fades away to black. Actually kind of swipes away from the tv's left to right. I can't see a picture with a flashlight. I still haven't taken the cover off yet.

[tom66]

Re: Acquired a JVC LT 32EX38 need help

When this occurs the backlight is lit up?

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

Yes the backlight is still on when it does this. I can see the splash screen and then it dims a little and the fades away from the left to the right. Not sure if I have audio or not as it fades away before I can tell what input tuner it is tuned to.

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

Ok after putting an HDMI source to the tv and scrolling through the input button I can hear audio. I can also see the screen dimly flash as it switches input sources. I am thinking main board already and I haven't taken the cover off yet.

[tom66]

Re: Acquired a JVC LT 32EX38 need help

Is there any chance you can make a video of the problem?

[aaronwt6]

Re: Acquired a JVC LT 32EX38 need help

Sounds a heck of a lot like the Phillips TV I just replaced the T-con board in.

https://www.badcaps.net/forum/showth...light=phillips

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

I will try. I haven't posted a video on here before.

[tom66]

Re: Acquired a JVC LT 32EX38 need help

YouTube works good. If you need help PM me or another helpful member and you can email one us the video and we can upload it.

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

Does this do it?

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

You can see it here I hope.

http://youtu.be/v_nR7qIK718

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

Thanks Tom. Yeah I figured it out after a while. LOL

[tom66]

Re: Acquired a JVC LT 32EX38 need help

Very strange. I'm very tempted to suggest firmware problem, given how the JVC logo disappears. Can you get any other video to show on the TV, or is it just stuck on that logo?

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

The first time I turned it on I was able to see the setup menu but it went blank after a few seconds. I have not seen it since and it has been plugged in since I first tried it. I suspect if I unplug it for a while and plug it back in to power it might go past to jvc splash screen again?

[tom66]

Re: Acquired a JVC LT 32EX38 need help

Either way, it suggests a main board problem.

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

Ok ... I'm about to pull the cover and look at the board for anything obvious. I will keep you posted.

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

Bump . . . . I finally found a Main Board for this TV and installed it and it is doing the same thing. So I think I am off to locate a t-conn board and try that. I really would like to fix this thing.

[stinger381]

Re: Acquired a JVC LT 32EX38 need help

The t-conn did the trick but one of the HDMI ports does not work. Wonder if this tv took a lightning hit ? The tv works flawlessly otherwise now.

[Th3_uN1Qu3]

Re: Acquired a JVC LT 32EX38 need help

Examine the affected HDMI port carefully and give it a good cleaning. Also resolder all the pins. If this does not fix it leave it alone.

Are you still using the replacement mainboard or are you back to the original one?