sony kdl-46S4100 dark, no sound, inverter?

[Houston1381]

I have a sony kdl-46S4100 that one day went dark,
no sound,
powers on by the remote,
has a click at power on,
power light glows steady,
no backlight that I can see
no heat detected anywhere
remote fails to do anything after power on
no sound, no smell

Ive been swapping parts from ebay trying one different board at a time

power supply board - no change
main board - no change

I have a salvaged tcon board and inverter board that i have not tried yet.

Anyone have a beginners troubleshoot algorithm that I can do with a multimeter? Sorry in advance, I'm trying to learn this as I go.

[Village Electronics]

Re: sony kdl-46S4100 dark, no sound, inverter?

I have a sony kdl-46S4100 that one day went dark,
no sound,
powers on by the remote,
has a click at power on,
power light glows steady,
no backlight that I can see
no heat detected anywhere
remote fails to do anything after power on
no sound, no smell

Ive been swapping parts from ebay trying one different board at a time

power supply board - no change
main board - no change

I have a salvaged tcon board and inverter board that i have not tried yet.

Anyone have a beginners troubleshoot algorithm that I can do with a multimeter? Sorry in advance, I'm trying to learn this as I go.

Blink Code?

[Houston1381]

Re: sony kdl-46S4100 dark, no sound, inverter?

No blinks - this model does not do that

[Village Electronics]

Re: sony kdl-46S4100 dark, no sound, inverter?

No blinks - this model does not do that

You are correct. It does not do that.

[cadiman]

Re: sony kdl-46S4100 dark, no sound, inverter?

Faulty panel or t-con.

Could be either with this panel.

check for 12vdc or so at t-con board fuse (very small near plug).

Grey panel (some backlight trying to get through) could mean no power to t-con.

Run through inputs with dvd plyer hooked up and listen for audio.

Just a few ideas for you.

[Houston1381]

Re: sony kdl-46S4100 dark, no sound, inverter?

Solved!

Thanks to cadiman for the tip - I swapped out the salvaged t-con board and it started working. I am still looking for the fuse in case this one fails too.

My process was:
take the back off and look for any bad caps anywhere on the PS or main board - dead end
research web for known issues -couldnt find any exactly like mine - most had sound or some other first symptom
swap out power supply with a ps from ebay - dead end
found another guy on ebay selling the guts of a tv like mine with cracked screen
swap out main board - dead end
put all oriiginal parts back in between attempts
buy a correct screwdriver that loosens really small phillips screws without stripping
remove tcon board
jerked out the ribbon cable from the board and tv - then found there was a little tab that popped up that pinched down the cable - luckily I didnt destroy the ribbon
test
shout up the stairs that I fixed my tv

Thanks for the tip and the forum

[cadiman]

Re: sony kdl-46S4100 dark, no sound, inverter?

You would have better luck using a microscope than any type of eyeglasses to find the fuse on the t-con. should be next to the input plug. The board will be marked F with a number after it like (F101). F for fuse. R for resister , D for diode etc.

If the fuse is blown on the t-con do not jump it with solder.

Glad we could help you!

[chums12]

Re: sony kdl-46S4100 dark, no sound, inverter?

I also have a sony kdl 46s4100 and have the same exact problems that Houston1381 had. So i tried swapping the t-con board with a salvaged one but nothing happen. I was wondering if someone can please help me.