Hitachi L40A105A Bad Picture

[billydanger]

I have a Hitachi L40A105A with a bad picture. My bet is the mainboard but I don't want to invest the $ in a new one (if I can find one) without some input from the experts.

I have photos of the power supply and mainboard as well as the powered up TV with and without an HDMI signal. I did not take photos of the inverter boards since the backlight seems to be ok. I can provide those if necessary.

If I leave the unit running for a while the picture will sometimes come in clearly for about 30 minutes or so.

Soldering is not a problem for me if necessary.

[CapLeaker]

Re: Hitachi L40A105A Bad Picture

looks like tab bonds to me

[nomoresonys]

Re: Hitachi L40A105A Bad Picture

Is that capacitor there by where it says Pb Free flat on top? Looks like it's bulging a little, might just be an optical illusion.

[budm]

Re: Hitachi L40A105A Bad Picture

Can we see the pictures of the whole backside of the TV? Right now I cannot tell if the TV has discrete T-CON board of integrated T-CON board.
Is the Tab bonding board on the bottom edge of the LCD panel?
What is the history of the TV?

[billydanger]

Re: Hitachi L40A105A Bad Picture

Capacitor is not bulging. Optical delusion!

Thanks for the reply.

[billydanger]

Re: Hitachi L40A105A Bad Picture

Photos of the integrated T-Con are shown. I have one shot that has the entire strip and three close-up shots of the Left, Center, and Right sections that can be pasted together for the whole thing if needed.

No amount of wiggling the flexboard connectors or the mainboard connector produce any change in the picture, either good or bad. I also used a heat gun up and down the T-Con board and the screen edges (VERY gentle heat) and also saw no changes.

Am I correct in assuming that the T-Con cannot be replaced without replacing the entire screen/T-con assembly?

Thanks to all of you for the replies.