KDL-46EX523 T-Con Board

[Global Safari]

Troubleshooting my Sony Bravia KDL-46EX523.Curious if there are fuses on this T Con
board I can check? I have found that when I remove the LVDS cable from
the T-Con board, the 12 Volts test point on main board comes back.I have
replaced the LVDS cable with a new one. No luck trying to find a service manual.

[neilc6]

Re: KDL-46EX523 T-Con Board

The fuse is on the top right beside the LVDS connector. Does your Sony give a blink code? Have you tried powering one side of the tv at a time with one ribbon connected? Does the TV turn on with backlight and no video which is why you should suspect the tcon?

[petehall347]

Re: KDL-46EX523 T-Con Board

top right by the looks of it .it looks different to everything else

[Global Safari]

Re: KDL-46EX523 T-Con Board

Hi,
That was my next step.Try powering it up taking one ribbon cable off at a
time.I get 5 blinks on my LED when trying to power it up.Code points to the
T-Con board.The power supply to main board cable has some issues also.
For some reason I have to position it just right just to start the trouble
shooting process.I will probably have to replace it. If taking one off and the problem
goes away, am I looking at a bad panel?

[Global Safari]

Re: KDL-46EX523 T-Con Board

Found fuse on T-Con board...read fine.Took off each ribbon cable one by one
and no change.Like I mentioned in the previous post, the cable running from
the main board to the power supply has issues.I tested the 12 volts at the
test point on main board,but went down as soon as the main cable was
slightly touched.Have to replace that like now to really continue the
troubleshooting steps.

[budm]

Re: KDL-46EX523 T-Con Board

Found fuse on T-Con board...read fine.Took off each ribbon cable one by one
and no change.Like I mentioned in the previous post, the cable running from
the main board to the power supply has issues.I tested the 12 volts at the
test point on main board,but went down as soon as the main cable was
slightly touched.Have to replace that like now to really continue the
troubleshooting steps.

Is the 12V the only that disappears when touching the cable between main and the power supply board? If that is all, then you can just solder in wire just between main and power supply board for the 12V line so you can do more test from there for now..

[neilc6]

Re: KDL-46EX523 T-Con Board

Check all the micro fuses on the main board. There should be one for the 12V to the TCON supplied through the LVDS cable.

https://www.badcaps.net/forum/showthread.php?t=66995

[Global Safari]

Re: KDL-46EX523 T-Con Board

Hello all,
Been awhile since I have been here, been spending time with the family.
Okay..so I am back troubleshooting this tv.Since I last wrote, I was having
a intermittent power issue with my wiring harness.Since then I ordered a new
one. I also bought a new main board before I had the wiring issue.With power
applied, I would see a red light coming from behind the main board.As of now
no red light at all.Checked dc voltage at pins coming from the power supply
not getting any 12 volt dc at all. Tested fuse..tested fine.Am I missing
something here?

[nomoresonys]

Re: KDL-46EX523 T-Con Board

Did you get the new harness on or you have one coming?

[Global Safari]

Re: KDL-46EX523 T-Con Board

New harness has been installed