Sharp LC-70LE650 - Shaded on one side w/ line down middle

[tech144]

Hello, I repairing a Sharp LC-70LE650U around 2 years old. And customer said one night while watching, picture developed line down the middle with right side having a noticeably darker shading. After it arrived in the shop, I noticed intermittent flickering of the shaded right side when first turned on. Then eventually picture on right side stays more shaded then left. Obviously, I checked the Tcon cable seatings and cleaned all contacts. Disconnected and reconnected several times, just to see if there is bad connections. But to no avail.
I searched here other threads on the 70 inch Aquos but this set does not have any blink codes or protection shut downs. I see there is an infamous "tab issue" with this model also. I am not sure where to check to see if there is bad connections on these tabs. Any help is much appreciated.Thanks.

[freakaftr8]

Re: Sharp LC-70LE650 - Shaded on one side w/ line down middle

Picture of the fault?

[budwich]

Re: Sharp LC-70LE650 - Shaded on one side w/ line down middle

Is the line horizontal or vertical. IF horizontal, then you are a likely "candidate" for the "saveable tab operation"... :-) IF its vertical, then :-( as it is likely a tab along the bottom which are not removeable to do a "save".

[tech144]

Re: Sharp LC-70LE650 - Shaded on one side w/ line down middle

Sorry no pics, and the line was vertical.........update! I found left t-con cable to panel had corrosion on the female cable terminal (The jack that the cable plugs into on the panel side). At first, when I initially observed the cables and the jacks in that area, I did not see it because it was hidden. So I ordered a ribbon cable off ebay and cleaned in extreme detail. I will give update later when cable arrives.

[tech144]

Re: Sharp LC-70LE650 - Shaded on one side w/ line down middle

Update...the ribbon cable fixed the vert line and flashing problem!! But Not out of the woods yet.

I had it testing for most of the day, and when I came back to it....it was the "2 blink slow- 2blink fast" error code and shut down. According to the manual, that's a "DET13v_ failure". OK..what I do know there is standby 5volts from PWR supply getting to the micro on the mainboard. What I dont know is what pin(s) on "PD" connector, between the 2 boards, has the Power On command from the micro to the PWR suppy board?? Want to make sure its not the PWR supply versus Mainboard problem? Any info is much appreciated. Thanks.

[freakaftr8]

Re: Sharp LC-70LE650 - Shaded on one side w/ line down middle

Since rooms corrosion I would definitely say that your cheek on board probably is at fault as something else is making intermittent contact. When solder connections get corroded it can cause all sorts of problems. You may be out of the woods with a panel as if you had a perfect picture the panel is most likely okay