Westinghouse WD55UDR101 bad picture goes black after a few minutes

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Ok, now you're getting somewhere, straighten out that blob, then see if the caps still read short, if still short remove one and test it, then test the other one while it's still on the board, one bad cap can make the others read short.

Solder blob removed! I can't believe I pulled it off. Thats definitely the smallest thing i've worked on. I have good eyes but they have their limits.

[nomoresonys]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Nice work, do you still have short on caps?

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Now as for the capacitors, here is what I got.

Caps highlighted in Red tested 146-147ohms one way and 67 ohms the other.

Yellow tested 2280 ohms both ways.

Orange tested 418 ohms and 617 ohms.

Purple which I removed and tested showed open circuit on diode test and resistance climbs until the meter (2000 counts) maxes out.

The two caps highlighted in blue in the second pic only show .03v when I had the tv running before I removed the capacitor. The others were all showing 0.25v.

[nomoresonys]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

You forgot the picture.

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

I forgot to mention when the tv was working voltage on those caps in the first pic was around 1.12v if I remember correctly and it would read 1.06v when the picture would go out.

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

You forgot the picture.

pics are added, im bad for that.

[nomoresonys]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Test the one you took off in diode mode, does it beep with the probes on both ends? and check the others the same way.

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Test the one you took off in diode mode, does it beep with the probes on both ends?

Thats the one that showed open circuit and when i tested resistance it just climbed until the meter maxed out.

[nomoresonys]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Ok, check the rest on the board for any more shorted if none maybe replace that one and see if tv works, I see some on youtube just get another same type ceramic cap that's the same physical size from a scrap board to use, shouldn't hurt to try the tv with the one cap off just to see if you get a different result than you were getting.

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

I was about to say I'm going to scrap the tv and keep the boards. Looks like i need to look at the main board, when I unplugged the lvds cable my short went away.

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

I spoke too soon the ic that got the solder glob on it has a few shorts to ground while the other ic doesnt.

[nomoresonys]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Ok, guess that IC got screwed up with all that solder.

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

IT'S ALIVE!!!! I put some flux on the ic and ran my iron across it a few times and I must have still had a short because I it fired up and the tcon ghosted for a second (negatively charged caps from the short?) and it's been working fine for the last 10 minutes or so.

[nomoresonys]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Nice, glad to hear it, so where that solder blob came from is a complete mystery then?

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Nice, glad to hear it, so where that solder blob came from is a complete mystery then?

No looking back at the first pic I posted of the tcon it wasn't there. That was 100% me,, not sure at what point I did it but I think the tv had two problems, the first which was the shitty power cables and the second which I caused.

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Turned it on and it's back to the same thing. I managed to get into the factory menu, a seiki remote works fine. I reset the eeprom which didnt fix anything.

I'm going to pull it back apart and check everything.

[MikeRWK]

Re: Westinghouse WD55UDR101 bad picture goes black after a few minutes

Is it safe to assume the 2 ics on the right correspond to the left and right side of the screen?