Re: Samsung 930b LCD cold start problem (inverter?)

Partial Recap (replaced only the three bulged caps).
[url=http://gallery.computingzone.net/computer/lcd_repair/recap_partial.jpg.html][/url]

Complete Recap (note some of the 100uFs are slightly smaller now.
[url=http://gallery.computingzone.net/computer/lcd_repair/recap-complete.jpg.html][/url]


Original with my diagram to remember which ones went where
[url=http://gallery.computingzone.net/computer/lcd_repair/bad-caps2.jpg.html][/url]Re: Samsung 930b LCD cold start problem

Re: Samsung 930b LCD cold start problem (inverter?)

Well I'm now in possession of two of these with the same problem (got a steal on the second one, figured I could fix both and sell one for a profit).
Got the caps in from Digikey and recapped one PSU completely. Power it on and..... nothing. DSP/LCD still kick on (can see the faint "no signal" box with a flashlight), but there's a god-awefull squeal emanating from the PSU now.
Figure I fubar'd the recap (the 100uF's I couldn't match perfectly) I moved to the second PSU and recapped only the bad 820s using...

Re: Samsung 930b LCD cold start problem (inverter?)

So then, the thicker wire should be the main if possible, but for the -/+ 3 seconds its going to get plugged in it really doesn't matter?
Thanx, I'll see what I can do.

Re: Samsung 930b LCD cold start problem (inverter?)

$10 is well within my budget for repair. No fuses that I can see (or rather, nothing that looks to be like its a fuse). The bottom has almost no components, mostly just traces but I'll grab a pic of it tomorrow.

100 uF, 450 Volt is correct on the big cap.


My google searching leads me to believe that LCD inveters and CCFLs are basically the same, and interchangable with, the CCFLs kits used for lighting in computer cases.
Would it damage anything to get a cheap CCFL (Say off one of those...

Re: Samsung 930b LCD cold start problem (inverter?)

OK, I don't know what this forum's policy is on thread necro but I'm going to bump this thread anyway. Found this via Google BTW.
I also have a Samsung 930B that suddenly decided that it didn't want to light. No fuss like the thread's OP monitor had, mine just didn't turn on one morning. Flashlight check showed the panel to be OK, just no backlight. I consider myself to be highly skilled when it comes to repairing minor problems and taking the LCD apart was no problem for me. However, diagnosing capacitors are a bit out...