Samsung 48H8000 Curved - No picture, No backlight with sound

[Mike7168]

Hello Friends,
This Tv comes with faults as follows:
No picture, No backlight and with sound.

When power cable to mainboard removed, backlight turns on.
So I replaced the mainboard, same result - No picture, No backlight and with sound.

Power cable to mainboard connected, disconnecting LVDS to T-con board backlight turns on, no picture with sound. Checking the fuse at T-con board all in order.

Removing 1 of 2 Flex cable going to LED panel from T-con board, backlight turns on, no picture with sound. Same result removing the 2nd flex cable and connecting the 1st cable.

Replaced the T-con board, same result.

Is the LED panel gone, experts please assist.

Thank You

[nomoresonys]

Re: Samsung 48H8000 Curved - No picture, No backlight with sound

Can you post some good clear straight shot pictures of each board and one of the whole back to see how they are all connected?

[William1967]

Re: Samsung 48H8000 Curved - No picture, No backlight with sound

Check for a capacitor near the COF connectors, one of them could have a S/C

[Mike7168]

Re: Samsung 48H8000 Curved - No picture, No backlight with sound

@nomoresonys, photos uploded
@William1967, will check and reply.

Thank You for the assistence

[budm]

Re: Samsung 48H8000 Curved - No picture, No backlight with sound

What is the history of the TV?
This LCD panel has tab bonding boards on the bottom edge of the panel, they can get damaged from cleaning liquid sprayed on the panel and dripped down on to the tab bonding board. I would inspect the caps on the tab bonding boards as suggested.

[Mike7168]

Re: Samsung 48H8000 Curved - No picture, No backlight with sound

@budm, Thank You. Am checking the caps at the said board. The COF connectors looks pealing off. I don't have much hope reviving this TV.

@nomoresonys & @William1967
Thank You

[nomoresonys]

Re: Samsung 48H8000 Curved - No picture, No backlight with sound

Got a picture of the peeling cofs? Could try with tv unplugged from power, unhook one side of ribbon cable from tcon to panel then power up, see what you get, do same with other side again with tv unplugged from power, never force a connection, most ribbon connectors just have a fastener that flips up with a fingernail, for those who may be looking on and don't know how they come out.