Nevir 39" LCD acting up. Broken panel?

[edugimeno]

Hi! I got this TV that was supposed to "not work well".

I turned it on and the BL got lit but nothing was showing on screen

Opened it and found that the only PS voltages present (12v and backlight) were 100% perfect

Plugged it back in and the screen kind of started up showing a NEVIR logo but it was split into several chunks with also missing lines in between. Nothing else

Next time the screen showed an amorphous large color cloud in the screen swinging from side to side (maybe a screensaver picture) with all broken lines everywhere.

I unplugged the LVDS cable from MAIN to panel and the image slowly faded away to black. I tried unplugging the flex that links both sides of the LCD panel boards and the image only happened on the right side, with only dim shades of the same in the left side.

At this time I want to be able to tell if this is a bad panel (the panel is 100% intact, at least physically), or the main board. Well, this is a single board TV set...

Also I tried gently pushing the edges of the screen, the flex cables from the LCD board to the LCD, and pushing also all the components on the LCD board and nothing changed at all

Any direction will be appreciated
Thanks!

PD: Videos too large to attach, can be found here: https://file.io/OhgBhoAUATsP

[edugimeno]

Re: Nevir 39" LCD acting up. Broken panel?

Just to add to this, the TV set responds to all either panel buttons (on-off, volume, channel) as well as remote commands. I mean I can't see anythng chnaging on screen as this sliding cloud is all I see, but the stb_by led flashes everytime I touch any button and I can turn it off/on with both panel and remote, so everything inside seems to be "alive"

[lotas]

Re: Nevir 39" LCD acting up. Broken panel?

There should be a fuse in this area (check it) DC 12V should be suitable for it.

[edugimeno]

Re: Nevir 39" LCD acting up. Broken panel?

There should be a fuse in this area (check it) DC 12V should be suitable for it.

Ok I will check that, and will that fuse cause such an effect on the screen?
Thanks

[lotas]

Re: Nevir 39" LCD acting up. Broken panel?

If the fuse is blown or there is no 12v power to the T-con, then the matrix will not work and there will be no image.
I misunderstood, you had something on the screen, so the problem is either on the bars (T-con) or in the panel itself.

[edugimeno]

Re: Nevir 39" LCD acting up. Broken panel?

Understood, I will check that fuse anyway.
Is there any easy way to determine if the issue is on the bars or panel?

Thanks

[lotas]

Re: Nevir 39" LCD acting up. Broken panel?

Well, if you disconnected the left side (loop) and the right side showed the image well, then the defect is on the left side, well then disconnect the loop and check all ceramic, blocking capacitors for low resistance or short circuit.

[edugimeno]

Re: Nevir 39" LCD acting up. Broken panel?

No no, I disconnected the left side (the one that's bridged to the right side) and left side went blank with just some remainig shades, and right side was still showing the weird cloud moving side to side, check the videos I uploaded, one is with bridge to second bar and other is without bridge

[lotas]

Re: Nevir 39" LCD acting up. Broken panel?

The video has been removed from your link.

[edugimeno]

Re: Nevir 39" LCD acting up. Broken panel?

I see, thanks for letting me know. I uploaded them again to this other site:
https://filetransfer.io/data-package/XpcUq2ZO#link

Tjanks

[lotas]

Re: Nevir 39" LCD acting up. Broken panel?

Yes, the defect is more like a problem in the panel itself, you can also check the voltages at the test points on the panel bar (T-con).

[edugimeno]

Re: Nevir 39" LCD acting up. Broken panel?

Hi again, I couldn't find time for this yet, but I was thinking, either if the fault is in the TCon boards (are those panel bars called T-con on these TV's too?) or if its the panel, its not easily fixable right? This is just a basic 32" set.

Thanks!