Samsung SyncMaster 2220wm

[el3ctroded]

Re: Samsung SyncMaster 2220wm

Got in the caps. The ones I ordered are 6kV, but that shouldn't matter. Put them in and the screen still blinks to black.

Hooked up 4 known good CCFLs and same result.

The secondaries on the transformers measure 472 and 468
I have also replaced the electrolytic caps.
I have re-soldered the joints on the transformers and numerous others.

Still 2s to black

I doubt my new 12pF 6kV and 33pF 6kV caps would be the issue... But maybe the transformer or the IC driving the transformer was damaged due to the old bad ceramic cap shorting internally?

I am getting more and more screens that have this problem and no apparent reason...

[el3ctroded]

Re: Samsung SyncMaster 2220wm

Ok. Digikey doesn't have 31pF, but they do 33pF. I'm gonna go with that unless you suggest otherwise.

[jetadm123]

Re: Samsung SyncMaster 2220wm

12J is 12pf where "J" is +/- 5% tolerance
31J is 31pf "

[el3ctroded]

Flash on, goes dim, then off.

I found a small non-electrolytic cap at the output of the secondary on the transformer in the inverter circuit that is bad, but I'm not sure how to read those... One says 12J 3kv. I know 3kv is 3000V, but is 12J 12pF or what?

The other one says 31J 3kv.

And are the caps that are always on the transformer's secondary in inverter circuits usually ceramic caps?

Thanks!