Westinghouse SK-32H240S

[OldMan]

While I wait on a part to arrive for my LG project, I decided to return to an older project which has made me go bananas .

TV is Westinghouse SK-32H240S. I got it from a friend who didn't feel like messing with it. Has no remote (this might become important as you read more). Measured the voltages and all seem quite normal. Where I stand now is trying to figure out what is wrong, so here are the symptoms.

-TV will power up to an all black screen.
-After ~5sec at this black screen, it goes to a dimmer screen with very faint rainbow vertical lines
-After ~15sec at the dim black/rainbow line screen it goes into standby with orange indicator light which was blue the whole time before.

I'm not sure if the side input selection button works as I cannot seem to get sound on any of the inputs. My LG project (here) makes me think the issue is again the T-CON board. They're quite cheap for this set, so maybe I could try it?

Also browsed the forum for other SK-32H240S issues and found one thread which seemed to be an inverter issue/2 seconds to black, but I have backlight the whole time and don't think this is the issue.

Could it be the power supply/inverter board? Any input would be a great help.

[tom66]

Re: Westinghouse SK-32H240S

Check for good supply voltages on the power supply. It does sound a lot like a T-con fault. I had a TV which confused me with the INPUT button; pressing it didn't change the input but brought up a dialog box allowing the input to be chosen...

[OldMan]

Re: Westinghouse SK-32H240S

Just realized I had a westinghouse remote - used it to switch to PC input. The audio DOES work just fine, however no video, just the vertical lines of multiple colors. Not as thick as the ones in my LG thread.

T-con or LVDS cable?

[OldMan]

Re: Westinghouse SK-32H240S

After a little more tinkering, all voltages still work out just as expected.

Swapped out LVDS cable with one from a box of old parts (same printing on cable so I know its correct) - still have the same problems. I'll not go for a T-con swap.

T-con board is : M$35-D010611-L$HPR705300KIE V320B1-C03
---but---
Panel is marked : M$46-D014124-L$W2101100576W1131 V320B1-L07 Rev:C1

Should I match to panel markings or the T-con that was installed?

[OldMan]

Re: Westinghouse SK-32H240S

Figured out which T-con I needed, it came in today and I swapped the boards out. Same issue as before. Failed panel or bad part? Both of my LVDS cables are producing the bad display (many vertical colored lines with black background). I measured all power voltages again and they're 12v or 5v on the pins that correspond the the markings on the board, still nothing crazy here. While I think this suggests it isn't a power issue, I hear a very distinct and higher pitched humming from the board. Maybe there is a region of higher resistance somewhere and the PSB/Inverter combo board isn't functioning correctly despite correct voltages at the main?

[tom66]

Re: Westinghouse SK-32H240S

Try unplugging some of the flat flex cables from the T-con to see if you can get a partial picture. It's possible there's a short circuit on the board somewhere.

[OldMan]

Re: Westinghouse SK-32H240S

Indeed if I unplug one of the two cables I get a half screen of lines. If I wiggle the LVDS cable when the lines are up, they change appearance (location and colors are different).