Sony KDL-32NL140: Powers On w/ Backlights, Black Screen - Bad TCON?

[JDC]

Re: Sony KDL-32NL140: Powers On w/ Backlights, Black Screen - Bad TCON?

there are no effective method for normal user like you an me to know if there are hidden panels that aren't cracked. unless eyes or power on or further oscilloscope signal measure according service manual given from manufacturing brands only.

Good to know. Thank you.

[JDC]

Re: Sony KDL-32NL140: Powers On w/ Backlights, Black Screen - Bad TCON?

Wait there, so even with a Tcon its the same failure ? If so I would say panel fault, possibly tab bonds. Also its normal for the Mb to get warm and discolor the Pcb like that.

That's what I was leaning towards (panel fault). I can't get anything to show on it whatsoever. But if the main board is baked, how do I know for sure?

[Diah]

Re: Sony KDL-32NL140: Powers On w/ Backlights, Black Screen - Bad TCON?

i can tell at yours model there are the first generation of Bravia Video processing engin which had allot of such fault of video. the same chips are responsible on Audio signal. try to hear any sound from yours Tv at any input signal !!!!

[JDC]

Re: Sony KDL-32NL140: Powers On w/ Backlights, Black Screen - Bad TCON?

i can tell at yours model there are the first generation of Bravia Video processing engin which had allot of such fault of video. the same chips are responsible on Audio signal. try to hear any sound from yours Tv at any input signal !!!!

No good.

For the heck of it, I measured the connection from the power supply to the main board. All check out except for the 2 wires marked 13v; they measure 16v.

[JDC]

Re: Sony KDL-32NL140: Powers On w/ Backlights, Black Screen - Bad TCON?

Bump.

[JDC]

Re: Sony KDL-32NL140: Powers On w/ Backlights, Black Screen - Bad TCON?

Bump.

So the two wires marked "unreg 13v" on the power board run into the main board. From there, they are measured at 16.25VDC. This doesn't seem right to me. The two offending pins on the main board measure around 15VDC with everything unplugged on the board except the main power.

I don't know a lot about electricity or components but aren't these 2-3 extra volts bad?

[Diah]

Re: Sony KDL-32NL140: Powers On w/ Backlights, Black Screen - Bad TCON?

so you did asked and you answered question 15VDC are so much. why don't you go ahead to replace the MB before you are going to damage yours power board.