pn50b650s1f

[tom66]

Re: pn50b650s1f

I'd say a good chance of a loose connector for that part of the panel, doesn't look like a bad panel to me. Also make sure ribbons from control board are seated into the boards correctly.

[bodaciuos]

Re: pn50b650s1f

thanks i will try that. i soldered a thin wire on the fuse just to see if it start up. which worked. will this affect anything? just for testing of coarse.

[tom66]

Re: pn50b650s1f

If the fuse blew there's a chance the panel is bad, but it's quite rare for one to fail like that.

[bodaciuos]

Re: pn50b650s1f

yeah thats what i though. the fuse is there to protect the board i will amagine. any ways i just hope the cable that connects the two together is right. ill try to check the buffer cables this evening. thanks to you both.

[bodaciuos]

Re: pn50b650s1f

ok . update i looked at te bottom buffer boards. i didnt see anything visual wrong so i decided to reow the board a little just to see if there was a change. now the red line is yellow .. go figure..

[tom66]

Re: pn50b650s1f

You've gone from losing both green and blue to losing only blue for that part; in my opinion, that's progress. Whatever you did, try doing it again. Check ALL connectors on BOTH ends of the control board and buffer boards.

[bodaciuos]

Re: pn50b650s1f

thanks tom for the advise. and to keep me going with it. i hate to giving up. but i was going to. update , after all the panel is good. i reflowed the left side lower buffer board with a heat gun . and it work im back to a normal picture. i see how long it will hold up being these tv heat up.... does any one know where i could fine the mini ceramic fuse for this buffer board .. thanks to caeb and tomm for your help.. hope this helps someone else. reading is fundamental. great job guys..

[tom66]

Re: pn50b650s1f

Make SURE you install the heatsink for the X-buffer if you run the TV for longer than about 30 seconds.

What is the rating of the original fuse?

[Caleb]

Re: pn50b650s1f

The original is an 8 amp, here is a similar fuse on digikey, Its 250v ac 125v dc Tom will that fuse will hold up in that location?

[bodaciuos]

Re: pn50b650s1f

not really sure. of the fuse..

[bodaciuos]

Re: pn50b650s1f

not really sure. of the fuse..

Make SURE you install the heatsink for the X-buffer if you run the TV for longer than about 30 seconds.

What is the rating of the original fuse?

tom what are the heat sinks your talking about? i dont see any on the boards. is it the metal plate you have to take off to get to them ?

[tom66]

Re: pn50b650s1f

Yes, the metal plate is the heatsink. It absolutely MUST be installed or failure of the panel is likely.
This should work as a replacement:
http://www.digikey.com/product-detai...90CT-ND/813068

[bodaciuos]

Re: pn50b650s1f

well that didnt last for long. i left it on about an hour. and know i have a purple line in the same area . im really nervous about reheating it again. i guess i have nothing to lose. what do you think . is it the heat flow of the board or something else.
so i turned t off about 20 minutes turned it back on and know the purple line is gone.. im loosing it..

is it possible that i dont have the fuse. will this make a difference ?. HHHmmm; maybe ill wait to get the fuse before i make things worse.

[Caleb]

Re: pn50b650s1f

What part are you reflowing? If it isn't the ribbon portion some flux added to the joints may give you a better reflow

[bodaciuos]

Re: pn50b650s1f

i flowed the left side lower buffer the side where the line is located.im assuming that each buffer controls the side it is on . am i right ? ill have to go to RS to get some flux. im just really nervous to melt he plastic connectors. i wish i new where exactly to heat so i dont have to heat the whole board..

[bodaciuos]

Re: pn50b650s1f

well i reflowed the board again with flux and it last about an hour. an the purple line returned. im at my wits end. i thought i had it this time. im going to ware out the screws threads. i think, im just not heating it up enough or it just cant be fixed..

[bodaciuos]

Re: pn50b650s1f

UPDATE; so i figured i has nothing to loose. so what i did was, so to not heat the ribbons and tabs, i left the heat sink on. to protect these part. and i was bold enough to heat each set of chips for 30 seconds each. at a low setting on heat gun. and so far so good. the set has been working about 2 hrs. i think i got it. call it lucky . i figured i had nothing to loose . so after 2 week and 150 bucks give or take. and the most important thing .knowledge.. thank guys

[Caleb]

Re: pn50b650s1f

Once you have the basics down broken TVs seem to appear everywhere. I fixed my first LCD about 8 years ago now I fix several each month. Don't get too discouraged if it fails again there's always another TV to be found. I hope your repair holds for many years, I just gave away the first TV I fixed to my mother In law and its still going strong.

[bodaciuos]

Re: pn50b650s1f

Once you have the basics down broken TVs seem to appear everywhere. I fixed my first LCD about 8 years ago now I fix several each month. Don't get too discouraged if it fails again there's always another TV to be found. I hope your repair holds for many years, I just gave away the first TV I fixed to my mother In law and its still going strong.

yeah , thanks for your help. i would of gave up. i thought there wasnt a fix for the vertical line., but it seems to be holding for know. my friend want to buy from me but im not sure of the fix. actaully i love the graphics of the tv .for me it looks alot better than the samsung led smart tv ,which cost me a grand. dam i wish i would hae found ths tv 6month ago i could of save a grand or more.. oh well. life goes on .now maybe i could make some of that money back.

[tom66]

Re: pn50b650s1f

Plasma > LED almost always. This will beat any LED TV on picture quality.