Viore lc22vh56pb

[brian the hack]

My nephew's TV is sitting on my bench-dead.

It seems similar to 2 seconds to black except no image or sound. There is snow on the screen once it turns black, if viewed with a flashlight. It has no sound, and the power light stays green. The menu button seems to work, but not the source button as far as I can tell. I don't think it can be assumed that the main board is good, so do I need to suck it up and buy a main board for him?

Thanks for any advice!
Brian

[brian the hack]

Re: Viore lc22vh56pb

OOPS-UPDATE!

I just figured how to change the source and now I have image and audio....on to the 2 seconds to black troubleshooting!!!!

[selldoor]

Re: Viore lc22vh56pb

Need a picture of the back of the power supply board.
and the number off theside of the inverter transformers - T1 and T2

You may find this useful start at post19

https://www.badcaps.net/forum/showthread.php?t=10419

When the backlight goes off does the power led stay lit?

[brian the hack]

Re: Viore lc22vh56pb

Need a picture of the back of the power supply board.
and the number off theside of the inverter transformers - T1 and T2

You may find this useful start at post19

https://www.badcaps.net/forum/showthread.php?t=10419

When the backlight goes off does the power led stay lit?

Thanks selldor!

yes the power light stays green. I have just started on that link. "bck-19252wh 1210" is the number on t1 and t2

[selldoor]

Re: Viore lc22vh56pb

Ok First can you get a brush and brush off whatever is on the board - hasnt had a liquid spill??
No power to the board Meter on ohms 2000 test TP6 to TP4 and TP7 and TP9
Top corners of the board (in your back picture)

[brian the hack]

Re: Viore lc22vh56pb

it doesn't look like a spill looks like sloppy manufacturing...it doesn't wipe off.

tp 4-6 is 620 k ohms
tp 7-9 is 621 k ohms

[brian the hack]

Re: Viore lc22vh56pb

c5 is burnt next to t1 --- c13 next to t2 is bright blue.

[selldoor]

Re: Viore lc22vh56pb

Yes - I had just spotted that - it looks to me as though the glue they used to stick the
lamp plugs in gas gone conductive. Carbonised then shorted possibly taking out the
capacitor and if unlucky the transformer
Suggest replace the capacitor and price up the transformer?

EDIT Oh Good - just backtracked on the transformer results and it looks like its ok


EDIT2 I am assuming you mean 620 ohms not K Ohms

[brian the hack]

Re: Viore lc22vh56pb

Thanks so much!
I will source the cap and report back.

Yes, sorry .620 k ohms 620 ohms

[selldoor]

Re: Viore lc22vh56pb

While you are there there is a new thread here that we are hoping to promote to beginners
and I was wondering if you would give permission for that picture to be used as it covers two things to look for in one picture - off colouring and burnt glue
https://www.badcaps.net/forum/showthread.php?t=38391

You will also need to clean off the burnt glue and off the other side before it goes bad

[brian the hack]

Re: Viore lc22vh56pb

While you are there there is a new thread here that we are hoping to promote to beginners
and I was wondering if you would give permission for that picture to be used as it covers two things to look for in one picture - off colouring and burnt glue
https://www.badcaps.net/forum/showthread.php?t=38391

You will also need to clean off the burnt glue and off the other side before it goes bad

Sure that is not a problem! Thanks again for your help!

[brian the hack]

Re: Viore lc22vh56pb

Hey Selldoor, it is working! I replaced c5 and all is good for now!!

Thanks so much

Brian

[selldoor]

Re: Viore lc22vh56pb

Hey - Well done - You will be favorite uncle for a while eh