Samsung pn58a550s1fxza powers on, no picture

[Ducki3]

My Samsung pn58a550s1fxza powers up normally with sound but there is no picture at all. The panel is dark and it does not flicker when it is turned on. The first thing I did was replace about six caps on the power supply that were known to be bad. Still had the same issue. Everything I have read online lead me to believe that it was the y-sustain board. I ordered a Y-sus and both buffer boards and replaced them all at the same time. I still have the same issue. Now I'm leaning back towards the psu again but I don't have a service manual so I wanted to ask if anyone happens to know the voltages coming into the Y main? or if anyone else has had the same issue. Thanks in advance.

[crashp3]

Re: Samsung pn58a550s1fxza powers on, no picture

Ducki3:

While I can't assist you with the defect you're having, I have the full service manual, schematics and training manual for this particular set.

I've reached out to tom66 for a way to send him the manual to host it on his site (http://www.tgohome.com/ServiceManuals/); it is approximately 77mb including all PDF documentation, schematics and powerpoint training guide.

If you have a dropbox account, or another method, please PM me the details - unfortunately 77mb is too much for me to email.

Thanks.

[killian6pk]

Re: Samsung pn58a550s1fxza powers on, no picture

Ducki3:

While I can't assist you with the defect you're having, I have the full service manual, schematics and training manual for this particular set.

I've reached out to tom66 for a way to send him the manual to host it on his site (http://www.tgohome.com/ServiceManuals/); it is approximately 77mb including all PDF documentation, schematics and powerpoint training guide.

If you have a dropbox account, or another method, please PM me the details - unfortunately 77mb is too much for me to email.

Thanks.

If you have a Dropbox Account then just upload to them and Tom can retrieve it from your Dropbox and put it on his site.

[crashp3]

Re: Samsung pn58a550s1fxza powers on, no picture

done Tom has them now

[tom66]

Re: Samsung pn58a550s1fxza powers on, no picture

Files are uploading right now...

[tom66]

Re: Samsung pn58a550s1fxza powers on, no picture

http://tgohome.com/ServiceManuals/?d...&Search=Submit

and also schematics available under BN44-xxxxxx - just search from the home page.

[Ducki3]

Re: Samsung pn58a550s1fxza powers on, no picture

Awesome! Thank you very much! Now lets get this thing up and running.

[tom66]

Re: Samsung pn58a550s1fxza powers on, no picture

URL changed, it is now http://tgohome.com/ServiceManuals/?d...&Search=Submit

[CoppellTVRepair]

Re: Samsung pn58a550s1fxza powers on, no picture

Sorry for the brief post, but I just had a failure trying to post a long and more detailed one and that got me upset.

First, having sound, but no image is rarely a power supply board problem, except in some of the older power supplies which allow Vs to go low unnoticed; most modern supplies would shut off if Vs goes out of range in either direction.

That said, checking Vs is still the frist thing I'd do if I have sound, but no image in a plasma TV.

Next would be the sustain boards output voltages.

Here are a few links for help with the power supply if needed:

http://www.coppelltvrepair.com/p/891...it-for-old-dud

http://www.coppelltvrepair.com/p/890...nd-off-problem

There may be more by the time you read this...just search for the TV model or board model at http://www.coppelltvrepair.com .

[capkid]

Re: Samsung pn58a550s1fxza powers on, no picture

In my comparatively limited experience with the newer Samsungs, and based on the numerous threads regarding these TVs that include a final resolution, the PSU is rarely an issue.