Samsung ln46c650l1f

[husky601]

Hey guys!

i do have a problem of i would believe the back light on my tv. All the settings seems to work fine but from the left to the right the screen is geeting darker. I just want to get some opinions. Thank you.

Alex

[mmartell]

Re: Samsung ln46c650l1f

If this has the BN44-00341B power supply there are two common problems. First is a strobing backlight, the second is no backlight - you are somewhere in between lol. To test for the first condition you can cut (or lift one end) of JP852 TEMPORARILY (this defeats a safety feature!) and see if backlight returns to normal. If so look for the proper fix on here. For the second problem CI818 is likely to blame, replacing this recently fixed my No Backlight condition. Good luck.

[husky601]

Re: Samsung ln46c650l1f

Ok thank you!! Already did theses 2 fix but no chances. If i am asking to get more power the back light shut off. Like if i do a volume test and if i raise the volume on the roof or if i plug the HDMI cable back light shut down. Thanks for your tought!!!

[johnboy1313]

Re: Samsung ln46c650l1f

It's very possible that your panel has failed.

[husky601]

Re: Samsung ln46c650l1f

Yes i don't know what i would try next....

[mmartell]

Re: Samsung ln46c650l1f

Maybe the main board is sending faulty dimming sìgnals ? Have you removed the main board cable from the power supply and plugged in to see if you have full brightness on the back light ?

[husky601]

Re: Samsung ln46c650l1f

At the start the back light is pretty strong but for a fraction of second. I do have 2 other faulty power suply of the same model so i will try to swap a few component from bord to board to see if it can change something. Thank you!!

Alex

[budm]

Re: Samsung ln46c650l1f

'If i am asking to get more power the back light shut off' What do you mean by that?
Did you check the DCV between the two legs of the main filter cap in the primary side to make sure it has close to 400VDC?
Is your power supply board Samsung BN44-00341B?
http://www.shopjimmy.com/samsung-bn4...t-inverter.htm