Lg 50PS3000

[ReeceyBurger123]

Hi all, I have this 50" LG plasma here that I was given for free so not too bad. The fault is the tv is troublesome to start, reading up I can see that faulty Zsus can be an issue however with both Ysus and Zsus upluged the set still acts the same way. I checked the Pson signal and its fine and with in spec all the time. I can tell that some one has repaired this tv before as there is some obvious work thats been done on the Zsus. Just wandering if anyone has any info the Psu it will fail to bring the Va & Vs and another other rail over 5v up when its faulting out and it does no seem to be temperature related. Thanks in advance.

[ReeceyBurger123]

Re: Lg 50PS3000

Right looking into this seems that the 5vstby is sagging so wander whats happening there. Doing some research I can see that some people have had the issue of the 5vstby chip failing better get checking.

[Andrew F. Ali]

Re: Lg 50PS3000

With the main board disconnected is the 5Vstby still sagging?

[Andrew F. Ali]

Re: Lg 50PS3000

Do you know how to self test the Pwr Bd?

[ReeceyBurger123]

Re: Lg 50PS3000

Its ok mate I have found something now, the reason why the 5v sags when main is disconnected is I'm guessing because it isn't being loaded. However found that the mainboard is actually causing the Vs and Va to drop out as it looses the Vson signal to psu however when I flex the mainboard that signal comes back and the tv works. I have made a youtube video and will be posting it when the tv is fixed thanks for the input though.

[Andrew F. Ali]

Re: Lg 50PS3000

Thanks for the feedback..

[ReeceyBurger123]

Re: Lg 50PS3000

No thank you for the input this one was quite a difficult one hopefully a new mainboard sorts the issue.

[ReeceyBurger123]

Re: Lg 50PS3000

Ok so I fixed the set today, it was the mainboard I will make a separate thread with a diagnoses and repair video linked to it.

[Andrew F. Ali]

Re: Lg 50PS3000

Thanks a lot. This is what is keeping this Forum alive.

[ReeceyBurger123]

Re: Lg 50PS3000

Thanks a lot. This is what is keeping this Forum alive.

Haha thanks mate and no problem

[Andrew F. Ali]

Re: Lg 50PS3000

Saw your YouTube video....Great job....Yes I agree...those bloody intermittent faults are the most tedious....Excellent and thanks again.. Regards

[ReeceyBurger123]

Re: Lg 50PS3000

Haha cheers