LG 50PS3000 Pink/Red Haze and Grainy Picture

[mrsweet1991]

Hi All,

So I have the 50" LG PS3000 TV that has developed red haze (which looks to me more like a pink haze). After doing some research I purchased a repair kit that contained a number of parts to solder on to the controller and z sus board. The Z sus board had a total of 9 parts replaced which where:

Q13 / Q14
Q15
ZD201
R201
R209
R457 / R458
C201

And also the controller board had these replaced:

C8
C9
C14
C15
C31
C39
C652
C653

Initially the red haze seemed to have disappeared, however the picture was very grainy. Once 3 minutes had passed the pink haze kicked right in and was back to its normal self. I turned the TV off completely and re-tried, same thing.. grainy picture and after warming up the pink haze kicks right in.

I have no problem purchasing a new board, but I need to get some advise as to which board or boards need to be replaced.

Any help would greatly be appreciated.

[mrsweet1991]

Re: LG 50PS3000 Pink/Red Haze and Grainy Picture

Bump.

[anotherdude]

Re: LG 50PS3000 Pink/Red Haze and Grainy Picture

maybe go over your soldering make sure there all soldered correctly I had a bit of trouble with the small caps on the control board, also may sound stupid but check you have them all in the correct place/position polarity etc

I had trouble with the small diode as it's directly inbetween a heatsink and lots of other parts, I ended up soldering it to the backside instead

https://www.badcaps.net/forum/showthread.php?t=33311

[mrsweet1991]

Re: LG 50PS3000 Pink/Red Haze and Grainy Picture

maybe go over your soldering make sure there all soldered correctly I had a bit of trouble with the small caps on the control board, also may sound stupid but check you have them all in the correct place/position polarity etc

I had trouble with the small diode as it's directly inbetween a heatsink and lots of other parts, I ended up soldering it to the backside instead

https://www.badcaps.net/forum/showthread.php?t=33311

Thanks for the reply, I'll go back over them again and double check. Also I was looking in eBay again for a cheap z sus board and I come across another repair service. In his description he states

"Output mosfet transistors (under small, black heatsink) will continue to run hot after switch-on causing premature failure of the board"

Maybe this is something I should look in to as well, the reason being is the pink haze kicks in only after a period of time which to me sounds like what the guy is on about with the MOSFETs heating up.

I wouldn't even mind buying a new board, but on a few threads I've heard the y sus board being mentioned as well as some others so I can't buy the z sus board with confidence. Would you say the z sus is the likely culprit for the grainy and pink haze or could it be something else as well?

Many Thanks,
Dan

[anotherdude]

Re: LG 50PS3000 Pink/Red Haze and Grainy Picture

Thanks for the reply, I'll go back over them again and double check. Also I was looking in eBay again for a cheap z sus board and I come across another repair service. In his description he states

"Output mosfet transistors (under small, black heatsink) will continue to run hot after switch-on causing premature failure of the board"

Maybe this is something I should look in to as well, the reason being is the pink haze kicks in only after a period of time which to me sounds like what the guy is on about with the MOSFETs heating up.

I wouldn't even mind buying a new board, but on a few threads I've heard the y sus board being mentioned as well as some others so I can't buy the z sus board with confidence. Would you say the z sus is the likely culprit for the grainy and pink haze or could it be something else as well?

Many Thanks,
Dan

on my thread tom66 said it was the z-sus, I bought the kit fitted it and never had the sparklies or pink/red haze again

can you link to the kit you purchased?

this is the one I bought http://www.ebay.co.uk/itm/271325575779

[mrsweet1991]

Re: LG 50PS3000 Pink/Red Haze and Grainy Picture

on my thread tom66 said it was the z-sus, I bought the kit fitted it and never had the sparklies or pink/red haze again

can you link to the kit you purchased?

this is the one I bought http://www.ebay.co.uk/itm/271325575779

Hi again,

Exactly the same mate, so I suppose it could be very likely that something has been soldered wrong. Well I'll have a bash and retrace my steps, and if all else fails maybe take a good few close-up pics of the z sustain board to see if anyone can spot something I've perhaps done wrong.

And thanks for your help, I appreciate it

[Alastair E]

Re: LG 50PS3000 Pink/Red Haze and Grainy Picture

LG's are known for having a red-dot/sparklies issue, sometimes careful adjustment of Vs, SET-UP/SET-Dn can cure it most times a control-board firmware update is needed though...

[tom66]

Re: LG 50PS3000 Pink/Red Haze and Grainy Picture

AFAIK it doesn't apply to these using a 50H3 panel, too new (2009 generation)