dead ps-42q7hd samsung

[Motsey]

Hi I have a samsung ps-42q7hd which is not responding no lights/leds or anything and was wondering any anyoe could give me some guidence on testing the psu (it is model number PSPF441A01A) to see if itis working right and thus eliminating it as a fault.

I would really appreciate any help at all.

I can add pictures etc if you would like.

-Thank you

[Motsey]

Update.......

Just measured on a lead coming ou of the psu to the main board and the stb-%v is all over the place wont sit still

also D5.3V & D12v both give no reading at all.

Any idea guys? New psu?

[Motsey]

Also this looks like someone has previously tried to solder it but dont a bad job on it - pics included

[chrissie jones]

need a full piccie of power supply please.

[davenjax]

hi id have a look on ebay for a psu see how much they are and see if its cost effective to just replace or repair sounds like a psu issue to me .dave

[watteau]

Hello,

If the stand-by 5V supply is fluctuating, this is worth a check, before replacing the complete power-suppy.
It's normally a separate supply to the main, using a small transformer to supply the 5V.
Check the normal electrolytics, etc.

Regards
John

[Motsey]

Hello,

If the stand-by 5V supply is fluctuating, this is worth a check, before replacing the complete power-suppy.
It's normally a separate supply to the main, using a small transformer to supply the 5V.
Check the normal electrolytics, etc.

Regards
John

Thanks for your replys everyone

*I dont have a small transformer to supply the 5V - the electrolytics all looks fine to me

* I will get pic's done later on tonight for you

* Had a look for the board and it is expensive = £89 / 144.620$US and thats abit high for me at the moment

[Motsey]

Sorry for the late reply here are some pictures of the main power board -  let me know if they are ok or if you would like me to take more, if so which bit and whats best way of doing it eg Zoomed in close up.

Hope someone can work out what I could do/try to get this board working - Im up for trying almost anything.

-Thanks

[Motsey]

more pics but this time zoomed in so there are 3 pics which were taken kind of side by side - they might need piecing  together but i didnt want to attempt incase i ruined the quality.

-Thanks

[Motsey]

Are thesepictures ok or would you like me to take others?

[watteau]

Hello,

Check around this stage - see photo.

Regards,
John

[mulja]

Check 5 volt on that diod and replace this two capacitors

[Motsey]

Thank you very very much really appreciate it - i will try and get this done some time this week, just had abit of bad news so might have to do it next week

[countrydj]

Hi Guys...
I have a similar problem on the SAME power supply board.
My problem is that when swithing on the tv I just get a clicking sound and the tv will not turn on.
The pictures in this thread are the same as my power board.

I have visually checked all the capacitors and non of them seem to be dodgy. i.e. they all have flat tops.

Has anybody got any ideas how to cure this problem ???

[Motsey]

hello again guys unfortunately im back as its gone again but a different problem this time - its got the clicking and flashing blue light issue.
None of the capacitors looks blown but I have replaced a few of the capacitors that I had and it made no difference - should i just order the rest and replace them as well  just to be sure?

Could it be anything else?