Samsung le37b530 flickering backlight

[apeter1]

Hi,

I have le37b530 with flickering backlight. It has only one large 450V electrolytic capacitors. I'm reading 389v on it. I cannot see any badcamps.
The Powerboard is a BN44-00262A, the main is a BN41-01165B. What should I check?

Thanks,
Peter

[Hamie]

Re: Samsung le37b530 flickering backlight

Unplug the main board.

Plug In the tv. The backlights should come on automatically.

Do they still flicker?

[apeter1]

Re: Samsung le37b530 flickering backlight

I unpluged the main board, pluged in the tv. The backlights comes on automatically. It does not flicker.
At normal usage only the bright colours(white, yellow..etc..) flickering.

What could be the problem?

Thanks.
Peter

[apeter1]

Re: Samsung le37b530 flickering backlight

https://youtu.be/NBhwNTd52bI
https://youtu.be/oS0HgV7r37c

[CapLeaker]

Re: Samsung le37b530 flickering backlight

I am not convinced the problem is on the backlights, as I only see the left side flicker. Reseat the LVDS and Tcon cables.

[zomi]

Re: Samsung le37b530 flickering backlight

read here

https://www.badcaps.net/forum/showthread.php?t=44792

[apeter1]

Re: Samsung le37b530 flickering backlight

Hi,

I've checked all the cables but it still flickering. Also when I move the cables it does not flicker slower or quicker.
When I switch on the TV it flickers slowly. After that the flickering accelerates.

I've read the other topic. Which parts should/can I check without removing from panel?

Thanks,
Péter

[awyatt2]

Re: Samsung le37b530 flickering backlight

on the ln series there are four sm resistors on the back of the main board, don't know if your set is similar or not. search ln52c550 flickering backlights and it is the fix for the ln series. I used 2 3m ohm 1/2 watt thru hole resistors to fix mine. there is a jumper you can cut as well but it bypasses the protection circuit.

[budm]

Re: Samsung le37b530 flickering backlight

I unpluged the main board, pluged in the tv. The backlights comes on automatically. It does not flicker.
At normal usage only the bright colours(white, yellow..etc..) flickering.

What could be the problem?

Thanks.
Peter

So the BACKLIGHTS do not flicker? Then it will not be backlights problem.
'At normal usage only the bright colours (white, yellow..etc..) flickering.' bad backlights will not cause particular color to be flickering.

[apeter1]

Re: Samsung le37b530 flickering backlight

Yes, the BACKLIGHTS do not flicker. Only bright and vibrant colors flicker.
I've linked videos.

[zomi]

Re: Samsung le37b530 flickering backlight

Does this use one of the as15 chips on the tcon..
Could be signs of it failing ?

[apeter1]

Re: Samsung le37b530 flickering backlight

Hi,

There is not as15 chips on the tcon.
Do you have any idea?

Thanks,
Peter

[apeter1]

Re: Samsung le37b530 flickering backlight

Hi,

There is AS15-HF chip on the tcon.
Could it be fault?

Thanks,
Péter

[apeter1]

Re: Samsung le37b530 flickering backlight

I'm posting pictures...

[zomi]

Re: Samsung le37b530 flickering backlight

How goods your soldering
If you able to solder try changing it out.

Is it getting quite hot when tv is on ?

[CapLeaker]

Re: Samsung le37b530 flickering backlight

Tough call... Tcon or the panel itself. Post the voltages of the as15...

[apeter1]

Re: Samsung le37b530 flickering backlight

It is very hot when tv is on. How mach chance that the Tcon is bad?
I would repalce the Tcon is not too expensive. The soldering may very difficult for me.
Tcon no.: FT-5537T05C09-9CL-0000NEP-03151-04
Is only this number with Tcon good for this TV?

[CapLeaker]

Re: Samsung le37b530 flickering backlight

Should be starting with a BN number. Look into shopjimmy, put in your tv and they have one or an alternative.

[apeter1]

Re: Samsung le37b530 flickering backlight

It starts with FT-....
shopjimmy.com: Access Denied

[cliff_hootarski]

Re: Samsung le37b530 flickering backlight

use 55.37T05.C09