Samsung LN40D550K1FXZA wont power on

[shelby5041]

Hi

I picked up this lcd tv....wont power on...just blinking standby light if u hit poer button.....

I opened back to do a visual and think i see what the problem could be

1 of the tiny blue caps is fried

Does anyone have a service manual so i can find out value of the part....it has lettering on it but i cant make it out

[vinceroger69]

Re: Samsung LN40D550K1FXZA wont power on

cant seem to find a service manual only the 4 page fast track guide what power supply number is used in this set.
the nearest power supply schematic i can find is the a version im sure yours uses the b version but hopefully uses the same part you need

[budm]

Re: Samsung LN40D550K1FXZA wont power on

We need good clear straight shot pictures of the top and the bottom side of the board and also the P/N of the board (BN44-?????).
It sounds like another one of those failed snubber cap but I cannot be 100% sure until we see the pictures, you should know that by now.

[shelby5041]

Re: Samsung LN40D550K1FXZA wont power on

maybe so bud..i think i saw you replying to an older post sdimilar model tv

see photo circled in red

if this cap is bad which it looks bad.....would it cause tv to have power on issue?

the photo is stock photo not my actual board

[shelby5041]

Re: Samsung LN40D550K1FXZA wont power on

board # BN44-00440B

[budm]

Re: Samsung LN40D550K1FXZA wont power on

That is the snubber cap for the PFC diode DP802, so you probably do not have PFC Boosted Voltage for the rest of the power supply to run.
The cap is around 220pf 2KV.

[shelby5041]

Re: Samsung LN40D550K1FXZA wont power on

Thank you

That sound familiar in values i researched

Do i need exact value on the capacitance value?

[shelby5041]

Re: Samsung LN40D550K1FXZA wont power on

What type of cap is it?

Im on arrow.com now

[shelby5041]

Re: Samsung LN40D550K1FXZA wont power on

ok i just ordered from arrow.com

i love that site right now...for some reason they dont charge for shipping even on 50 cent order

i just ordered 39 cents for 1 cap and free shipping

here is description of what i orfdered

Cap Ceramic 220pF 2000V SL 5% (10 X 5mm) Radial 5mm 125°C

[shelby5041]

Re: Samsung LN40D550K1FXZA wont power on

Hey bud

Thank you....tv fixed

It was the 1 blue cap snubber is what u called it

Orig was 1kv i installed a 2 kv

Works great now.....