Need help with Samsung LN40E550f7f

[nomoresonys]

Re: Need help with Samsung LN40E550f7f

Highjack?? kindreds last post was 3-1-2018, said he wold post back but never did, he/she just left it hanging.

[pocketwatch62]

Re: Need help with Samsung LN40E550f7f

Thanks Guys very much.
I'll order the kit and post the results.

[budm]

Re: Need help with Samsung LN40E550f7f

Verify the kit to make sure the parts numbers of the parts matched what you have. I would replace just the PFC IC first instead of installing everything in the kit.

[nomoresonys]

Re: Need help with Samsung LN40E550f7f

It's correct, I triple check most everything I post.

[R_J]

Re: Need help with Samsung LN40E550f7f

Highjack?? kindreds last post was 3-1-2018, said he wold post back but never did, he/she just left it hanging.

It just makes things easier when trying to help someone if they start there own post.

[nomoresonys]

Re: Need help with Samsung LN40E550f7f

I might be a little less confusing but do we really need hundreds of threads about the same tv with the same problem?

[nomoresonys]

Re: Need help with Samsung LN40E550f7f

should have typed It might be.

[pocketwatch62]

Re: Need help with Samsung LN40E550f7f

Hey Guys,
Thanks so much for your expert help.
Got the parts today and changed ICP801 (FAN7930B)
Solved the problem.
Plays beautifully now.

Thanks again.

[R_J]

Re: Need help with Samsung LN40E550f7f

Thats good to here it's fixed,
So it seems to be if the PFC boosted voltage measures too high (~430vdc), it is a good chance the FAN7930B is defective even though it is boosting the voltage. Likely one of the input opamps is bad.

[nomoresonys]

Re: Need help with Samsung LN40E550f7f

Nice.