samsung le32s86bd main board or psu fault?

[multimeter]

Re: samsung le32s86bd main board or psu fault?

What board, the psu? Or the main board.
I do have a capacitence tester...and a hair drier lol, but its hard to pin point as it sometimes works strait away. Would a cap problem cause screen distortation? Last time it cam on with bit of yellow distortation allomg the screen. Its fine this time though

yes caps could cause that,if a cap supplying the tcon rail is failing then voltage would drop.

its the psu,heat all the caps ,and monitor if the fault happens again,if the caps are failing it may bring them back just enough to work.

id still esr them after though

[Alastair E]

Re: samsung le32s86bd main board or psu fault?

Even though those caps look good,--and marked with a pen (They all are in every one Ive seen!)
--The fault you describe sounds exactly like iffy old caps on the supply-rails to me...

The 1000uF 35V and the larger 25V caps are usually the cause....

[vinceroger69]

Re: samsung le32s86bd main board or psu fault?

have you just been testing the capacitors for the uf reading as you do really need a esr meter if you havent got one if not just replace the lot imo for panasonics

[charlierfc]

Re: samsung le32s86bd main board or psu fault?

hi all, thanks for the replys. i will try pin point the faulty caps with heat. i only have a capacitence tester. iv been a bit busy.ill try heat the board see if it turns on 1st time before i even attempt to turn it on.
thanks again for your input. i appreciate it.

[charlierfc]

Re: samsung le32s86bd main board or psu fault?

Hi all again, looks like anotherdude was right. Before any testing i heated the psu.the tv didnt come on. I then heated the mainboard near the shielded are.turned on 1st time and is still on.looks like failing mounted caps on the main board. So...loks like i need another main board!
Ill oreder one and hopefully that will be the end of the matter.

[anotherdude]

Re: samsung le32s86bd main board or psu fault?

another bordeaux model failing, whats with samsung and these main boards

[freakaftr8]

Re: samsung le32s86bd main board or psu fault?

Caps.on these mainboards come from different manufacturing facilities I notice.

[mmartell]

Re: samsung le32s86bd main board or psu fault?

So...loks like i need another main board!
Ill oreder one and hopefully that will be the end of the matter.

Or just replace some caps ?

[charlierfc]

Re: samsung le32s86bd main board or psu fault?

Its the small mounted caps that are gone by the looks of it, i dont think maplins have these in stock?
Can they be replaced by normal caps with the same uf?

[tom66]

Re: samsung le32s86bd main board or psu fault?

Yes, but do not use capacitors from maplins. Order them from CPC (free postage, no minimum order - you cannot go wrong) - and also, use Panasonic FM/FR/FC where possible. CPC also stock some smd caps but not many.