LJ92-01436A / LJ41-04516A Y-Main sustain post-repair question and answer

Synopsis: Below is a post-repair email exchange we occasionally get after servicing and sending back a plasma TV sustain board to a customer.

I can't say this is very common, but it happens often enough to justify exemplifying it.

Both the question and the answer are valid for any other type of sustain board I know.

Equally importantly, this is a great illustration on why one shouldn't write a nasty and sarcastic note to a service that just sent back a module which didn't make the things work as expected.

Luckily this particular customer wasn't that type, but, no offense meant, enough are.
And it only takes one bad experience to spoil a whole day, sometimes a whole week.

So next time you send us LJ92-01436A / LJ41-04516A Y-Main for repair (or any other module for that matter) and it doesn't work...please do not automatically conclude it is us!
 - Bobby

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From: the_inxpensive_xperts
To: coppelltvrepair
Subject: Re: Other: the_inxpensive_xperts sent a message about LJ41-04516A Y-MAIN SUSTAIN YSUS REPAIR SERVICE - READ THE LISTING! #160997579922
Sent Date: May-29-13 06:34:04 PDT

Dear coppelltvrepair,

Hey, got the boards, everything looked great, one problem, my screen looks like this, (in the pic), I thought maybe a loose ribbon, but I went back through them and they all were secured. Any ideas as to why it looks like that?

- the_inxpensive_xperts

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From: coppelltvrepair
To: the_inxpensive_xperts
Subject: Re: Other: the_inxpensive_xperts sent a message about LJ41-04516A Y-MAIN SUSTAIN YSUS REPAIR SERVICE - READ THE LISTING! #160997579922
Sent Date: May-29-13 06:44:53 PDT

Dear the_inxpensive_xperts, The problem on this screen is caused by missing driving signal in the ADDRESS portion of the display matrix (as opposed to the SUSTAIN portion, which is responsible for the horizontal lines). The addressing of the display is the vertical lines in the display matrix and they are manupulated through the bottom of the display. What you have is caused by one of two things: 1) Missing power to one of the boards sitting under the display and feeding information to the display panel 2) Damaged register/multiplexor ICs embedded in the display The later is not reparable and is usually manifested in one single strip 2-3 inches wide, but it can be more such strips too like in your case; still if I have to guess I'd go with the former option as failing address registers usually cause total shortage. But as for possibility both are possible. One thing is certain: this is neither a sustain board nor buffer boards. They handle the HORIZONTAL lines of the display and you have a total VERTICAL issue. Just to help you avoid wasting time looking for a problem where there isn't one... - coppelltvrepair

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From: the_inxpensive_xperts
To: coppelltvrepair
Subject: Re: Other: the_inxpensive_xperts sent a message about LJ41-04516A Y-MAIN SUSTAIN YSUS REPAIR SERVICE - READ THE LISTING! #160997579922
Sent Date: May-29-13 07:14:46 PDT

Dear coppelltvrepair,THANK YOU! it was a logic ribbon all buggard up. Fixed now. A little alcohol and a q tip lol. Hooking the HD back up and should be a great picture again. I just ordered the new buffers. Thanks again man.

- the_inxpensive_xperts