Baier LCD-27SL Burned component

[MrF]

So got this TV to look at from my parents.
Found 6 swollen topped capacitors on the power board and replaced them. Put it back together.....comes on Red to green LED screen powers on and almost immediately goes off and LED goes orange.
Looking underneath the board I find a rather burned looking component with damage to the surrounding PCB. Cleaned the board off with some alcohol and the photos show what was found.
Component at fault number seems to be R80, but I have no clue what it is.
Pics included.
Numbers on the power board : JSK3230-064, 7210089 and Rev 2A

Write off? or potential for resuscitation?

[selldoor]

Re: Baier LCD-27SL Burned component

Was the R80 area burnt before you changed the caps?
Can you clean any more - perhaps use a soft toothbrush with the alcohol.
R80 should have had numbers on top was there no sign of any.

What caps did you use as replacements and where did you buy them

Edit
Please can you do a straight on shot of both sides of the board in the same orientation
ie keep the top at the top.

What is on the other side of the board to the damage zone

[MrF]

Re: Baier LCD-27SL Burned component

Caps - Panasonic FM Caps from RS components (UK),all replaced with same values apart from 2 x 680uf caps swapped for 1000uf caps (had 1k's in stock no 680s)

No idea regarding below pre cap swap, unlikely from soldering as its quite a distance from any soldering work and nothing closer shows any sign of heat damage.

I'll get a soft toothbrush and try again, though I think the writing has had it as looking close the component looks....distorted.

Ok photos included
one showing an end on view showing whats on top vs whats underneath (you can see the red component thats at the bottom of the burned area underneath)
Straight on top view (board orientated as it would be in the TV)
straight on view of below (board flipped over so top is still top)

[selldoor]

Re: Baier LCD-27SL Burned component

Ok there are a few solder joints that dont look too good I will mark them tomorrow eyes are too tired tonight - but have a look at the mains input joints at the top of the back,
they dont look to clever.

As to the R80, just for the hell of it, can you test across it and see what resistance it has.
Unless it is autorangeing start with your meter on high ohms and work down. This board is on a few other sets but a quick search didnot come up with anything useful - what we need is another picture of an underside.

Sorry have to ask - have you checked that you have put the caps in the right way round?

[MrF]

Re: Baier LCD-27SL Burned component

Yep did make sure of that.
Might just recheck though.. murphys law and all...

[MrF]

Re: Baier LCD-27SL Burned component

812-814 @ 2000k ohms resistance.

[MrF]

Re: Baier LCD-27SL Burned component

Think I *may* have found another issue, albeit unrelated, connector plug for the side AV ports wasn't securely connected....that wouldn't have anything to do with this?

[tom66]

Re: Baier LCD-27SL Burned component

It would most likely cause non function side AV but not much else.

[MrF]

Re: Baier LCD-27SL Burned component

Fair enough.
Worth an ask though.

[selldoor]

Re: Baier LCD-27SL Burned component

812-814 @ 2000k ohms resistance.

Perhaps take it off the board and re test.
check the underside for numbers ( ever optimistic )