Samsung le23r88bd (r)

[Berts]

Hi,

I have a SAMSUNG LE23R88BD (R) TV.

The unit powers on but the display is black. No back-light or picture.

I have disassembled the unit but can see no signs of bloated capacitors.

just wondering what my next steps should be?

Replace inverter?

Thanks

Berts

[tom66]

Re: Samsung le23r88bd (r)

See if you can get sound from an external source.

[Berts]

Re: Samsung le23r88bd (r)

Hi, thanks for replying.

I have tried an external audio source to the TV and have no output, however the standby light comes on and flashes with the remote control, so I would assume power is getting there somewhere.

Any more thoughts?

Berts

[tom66]

Re: Samsung le23r88bd (r)

Have you tried pressing the SOURCE button to change input?

[Berts]

Re: Samsung le23r88bd (r)

Yes pressed the source button a few times just to cycle it. Will try again to make sure.

[Berts]

Re: Samsung le23r88bd (r)

Yes definable cannot get audio, any ideas as what to check next?

[Berts]

Re: Samsung le23r88bd (r)

I have noticed a whining sound from the power board.

It starts low and increases, last about 3 seconds then repeats over and over.

Any ideas?

[tom66]

Re: Samsung le23r88bd (r)

Sounds possibly like an MCU starting up and failing? Does the power board show any signs of having the caps replaced - are they Samwhas or other?

[selldoor]

Re: Samsung le23r88bd (r)

Seem to be working blind here - can you post some pictures?

please post good clear pictures of the whole chassis, and then pictures of each board, front and back and close up of connectors, (max resolution 2000x2000 and 2MB) using the manage attachments button, which is found by clicking "go advanced" under quick reply.
Examples of what is needed
https://www.badcaps.net/forum/attach...1&d=1290283049

https://www.badcaps.net/forum/attach...7&d=1280167246

[Berts]

Re: Samsung le23r88bd (r)

Hey, thanks for helping. Photos are attached, The large Cap on the power board looks a bit swollen, but I don't know if that is what they normally look like?

Also the Blue rectangular component on the power board has slight burn marks on the back, looks like it may have been repaired?

[selldoor]

Re: Samsung le23r88bd (r)

^^^^attached to what?

[Berts]

Re: Samsung le23r88bd (r)

Sorry, I thought they had attached.

Here you go....

[Berts]

Re: Samsung le23r88bd (r)

I have drawn a white arrow on the power board to the components that look suspect to me. Thanks again for any help.

[selldoor]

Re: Samsung le23r88bd (r)

Sometimes the Big Cap plastic lid looks a bit rounded if that is what you mean? we could tell better with a side view. The blue box is a capacitor but dont often fail.
On the inverter board - pic 5 there are 3 fuses (at least) can you check them using ohms 20 on your meter post results like Inv Bd F1 x ohms and so on.


Have you checked the red fuse on the power supply

[Berts]

Re: Samsung le23r88bd (r)

Hi would it be too much trouble to ask you to point out the location of the fuses you suggest that I should test? thanks and sorry to be a pain, am quite new to TV's

[selldoor]

Re: Samsung le23r88bd (r)

Tcon attached- there may be more cant see for flash and item in dots
not sure what that is but just test for continuity.

Red fuse on main board is a red rectangular fuse below the label that says
5WO.39(ohms)j

hint:
Suggest you type in fuse ( Or whatever component) to google and select images - you will get to see every fuse imaginable. Capacitors are good too from pinhead to the ones on overhead powerlines.

[Berts]

Re: Samsung le23r88bd (r)

Thanks mate, will post back how I get on. Really appreciate you time.

[Berts]

Re: Samsung le23r88bd (r)

Hi, all the fuses are good. The more I look into this the more I believe that it is a bad Cap on the power board. I have read another thread and a guy with exactly the same problem replaced the big blue cap and had success this would also concur with the heat damage to the board which is on one of the legs of that Cap.

My problem is now I am in the UK and the only place I can see where to get a similar Cap is here
http://www.digikey.co.uk/scripts/DKS...16859614659808
Its not the exact one but I am told it should work.
The postage from America is £12 and I was wondering if anyone knew of a place in the Uk selling the same component?

Thanks again Selldoor for all your help, hopefully this works.

[tom66]

Re: Samsung le23r88bd (r)

Try Farnell.

[Berts]

Re: Samsung le23r88bd (r)

Thanks Tom