Mulja tv repair portal

Equipment Repairs => PLASMA TV forum => Topic started by: mali67 on June 08, 2013,12:27:21

Title: lg 50pz550t
Post by: mali67 on June 08, 2013,12:27:21

Hi, ive had this in a while, and tbh was going to scrap it. it has top half of the picture perfect, but bottom half is unreadable pixles.
ive changes the lower buffer twice, and had a few ysus panels

(http://img827.imageshack.us/img827/2853/cam00058q.jpg) (http://imageshack.us/photo/my-images/827/cam00058q.jpg/)

any ideas would be greatful , cheers

Title: Re: lg 50pz550t
Post by: clark97 on June 08, 2013,12:56:13

Looks like a screen fault, looks to be more than half the screen which rules out buffer.

Title: Re: lg 50pz550t
Post by: mali67 on June 08, 2013,17:35:05

yea i thought about screen fault but ive never come accross this fault before

Title: Re: lg 50pz550t
Post by: mali67 on June 10, 2013,07:23:00

anyone any ideas

Title: Re: lg 50pz550t
Post by: marky mark on June 11, 2013,14:55:50

Disconnect a ribbon cable from the good part of the screen. See if you get the same effect, if the top of the poor picture isn't in line with a buffer ic then it must be the screen. I think :73:

Title: Re: lg 50pz550t
Post by: mali67 on June 12, 2013,03:56:14

as suspected, after disconnecting the screen ribbon, it left a horizontal black bar

Title: Re: lg 50pz550t
Post by: marky mark on June 12, 2013,15:11:18

I have seen that on sets that we've run without a lower buffer in.you don't always get a blank screen, I don't see how as clark97 says it seems to be above half way but I'd say you have no vs, just va.

Title: Re: lg 50pz550t
Post by: mali67 on June 13, 2013,03:16:55

got me thinking about this, and the picture shown isnt showing all the screen above the boxes making it look short, but it is defonatly even 50/50