LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

[noledud]

Hi all

Got this freebie LG PDP42V7 badged as a Hyundai HPT-4260

Problem is red LED powers after first click - ( standy by fine )

Press power then light turns blue and you have a delay until another click and it stays like that

Using DMM voltage comes up for a split second then shuts off again

if i apply heat to PS then it works as normal and i get a picture

dosnt take much heat to get working so hard to narrow down, iv seen other threads on this so i replaced the caps in the center row

C210 50v 1UF
C203 50v 10UF
C310 50v 1UF
C303 50v 10UF
C505 25v 220UF
C504 35v 47UF
C428 50v 1UF
C403 50v 10UF

These have made no difference, does any one suspect or know of a set of caps i should concentrate on as there are quite a lot on this board and all look good

Cheers

[noledud]

Re: LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

bump?

[tom66]

Re: LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

Have you replaced all the small ones on the primary side? Check for cold joints too.

[noledud]

Re: LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

primary side being the left with the majority of caps on? - no i havnt just wanted to get suggestions befor i did

iv check for cold joints re-flowed most the board to make sure

thanks tom

[scat]

Re: LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

Hi,
I have a problem of no picture on my PDP42V7 where the power supply seems fine, and my limited testing can't fail the Ysus or the Zsus. I'll post a new thread rather than hijack this. :0)