Panasonic tx-49fx550b no picture

[adamp91gvm]

Hi all bit of a newbie in this one I have a 49 inch pana that's not showing any picture bit if I put the av board in a cracked screen tv it comes up with a picture . Bottom board fuse is OK

[adamp91gvm]

Re: Panasonic tx-49fx550b no picture

Anywhere I could test on here ?

[diif]

Re: Panasonic tx-49fx550b no picture

Measure the voltage each side of the tcon fuse.

[adamp91gvm]

Re: Panasonic tx-49fx550b no picture

12.43v ether side

[diif]

Re: Panasonic tx-49fx550b no picture

Check that board for a short.

[adamp91gvm]

Re: Panasonic tx-49fx550b no picture

What would I check ?Best place to start?

[diif]

Re: Panasonic tx-49fx550b no picture

The SMD diode networks, the coils and the caps.

[adamp91gvm]

Re: Panasonic tx-49fx550b no picture

I 100% know the av board works tested in another telle

[diif]

Re: Panasonic tx-49fx550b no picture

Yes, you stated that in your first post.
Check for shorts to ground on the coils and caps and the arrowed devices i believe are diodes.

[adamp91gvm]

Re: Panasonic tx-49fx550b no picture

Will do . What's the best way to test these apologies Im still learning

[diif]

Re: Panasonic tx-49fx550b no picture

The diodes you test with diode mode placing the probes on each pin opposite each other then measuring again after reversing the probes.
For the coils put your multimeter into resistance mode with the black lead on ground, same with the capacitors.

[adamp91gvm]

Re: Panasonic tx-49fx550b no picture

Thank you very much I'll give it a go

[adamp91gvm]

Re: Panasonic tx-49fx550b no picture

On this one with the 220 on with black to chassis it's beeping on all 4 corners but the other 220 's ain't