Samsung PS-42Q96HD

[thuss]

HI

I am new to this site so I hope I'm posting in the right section.
My tv would not turn on it was completely dead. So I opened up the back and noticed 2 bulging capacitors on the psu which I changed.

Now I get sound but no picture. There is voltage going through the x and y boards.

On the logic board there is 2 green leds on.

If somebody else has had the same problem any advice would be appreciated.

Thanks in advance.

[psmedley]

Re: Samsung PS-42Q96HD

There are likely other bad capacitors that are not bulged. Do you have access to an esr meter? These are extremely useful to detect bad caps.

Also - need photos on the power supply - front and back and ensure they're posted as attachments

[ben7]

Re: Samsung PS-42Q96HD

HI

I am new to this site so I hope I'm posting in the right section.
My tv would not turn on it was completely dead. So I opened up the back and noticed 2 bulging capacitors on the psu which I changed.

Now I get sound but no picture. There is voltage going through the x and y boards.

On the logic board there is 2 green leds on.

If somebody else has had the same problem any advice would be appreciated.

Thanks in advance.

Searching the internet, the PSU for this is familiar to me. Ours had two bad caps and also, the mosfets on a heatsink had overheated and needed to be replaced. The PSU I am referring to looks like this, does yours look like that?

[thuss]

Re: Samsung PS-42Q96HD

Hi

psmedley - I have soldered all the caps out and tested them on my meter which has a built in uf tester and they all come within the 10% range.

ben7 my psu model number is DYP-42W2PLU Rev 1.o, code BN44-00194A. I cant post any pictures probs with my phone. But I think you maybe right one of the three legged mosfet on the heatsink is reading both ways?

[ben7]

Re: Samsung PS-42Q96HD

Hi

psmedley - I have soldered all the caps out and tested them on my meter which has a built in uf tester and they all come within the 10% range.

ben7 my psu model number is DYP-42W2PLU Rev 1.o, code BN44-00194A. I cant post any pictures probs with my phone. But I think you maybe right one of the three legged mosfet on the heatsink is reading both ways?

It depends on which pins you are measuring. Do you mean that you are getting a reading both ways on a certain pin combo? (like, measuring from gate to source) If so, it sounds like it could be bad. Although, the other circuitry on the board could be fooling you.

[psmedley]

Re: Samsung PS-42Q96HD

preher-tv.blogspot.com.au/2011/06/samsung-hpt5044-no-power-clicking.html is a good resource for Samsung power supply issues

[ben7]

Re: Samsung PS-42Q96HD

preher-tv.blogspot.com.au/2011/06/samsung-hpt5044-no-power-clicking.html is a good resource for Samsung power supply issues

Yep, that looks exactly like the one that I fixed.

[thuss]

Re: Samsung PS-42Q96HD

Hi

Sorry about the late response. I have checked the mosfets and they seem to be ok. When I get a chance I will check other components- BTW how do I attach pictures or files to this message? thanks

[wembleyhill]

Re: Samsung PS-42Q96HD

hi i have the same problem changed faulty caps now i get sound no picture led on front blinks 5 times did u find the problem ?

[wembleyhill]

Re: Samsung PS-42Q96HD

HI

I am new to this site so I hope I'm posting in the right section.
My tv would not turn on it was completely dead. So I opened up the back and noticed 2 bulging capacitors on the psu which I changed.

Now I get sound but no picture. There is voltage going through the x and y boards.

On the logic board there is 2 green leds on.

If somebody else has had the same problem any advice would be appreciated.

Thanks in advance.

Hi i have the same problem changed faulty caps now i get sound no picture led on front blinks 5 times did u find the problem ?

[thuss]

Re: Samsung PS-42Q96HD

sorry no