Re: Samsung SyncMaster 2493HM black screen with power

Your problem sound just like mine. If yours is like mine, you have maybe a week after it starts to black out before it will just stay black. Mine worked for a few days after being unplugged for about a week. I just finished replacing all the caps on the power supply board and the two on the inverter board. However this did not fix my problem and I have ordered a new monitor.

The process I went through provides no guarantees of repair, however does offer a chance for approximately $20 US (plus about $5 for a soldering...

Re: Samsung SyncMaster 2493HM black screen with power

Update: lcdalternatives shipped the missing cap and has fixed their kit to correctly match the board.

I installed the 2 caps on the inverter board and now the backlight doesn't turn on at all. I didn't really know what I was doing on the surface mounted components, so maybe I didn't get a good connection? I removed them, cleaned off the contacts with rubbing alcohol and resoldered. I also melted the solder around the big black components with the wire wrapped inside, thinking that might help. All the solder looked...

Re: Samsung SyncMaster 2493HM black screen with power

Received my repair kit from lcdalternatives and desoldered all the capacitors from the power supply board. I realized that lcd-alt's kit has (2) 50v 22uF caps, when there should only be one, and (1) 50v 2.2uF cap. I have sent an e-mail to them. Just a warning to any others.

Digikey had an inventory discrepancy and so I'm also waiting on a back order for the two caps on the inverter board.

Re: Samsung SyncMaster 2493HM black screen with power

I've decided to try replacing all my caps. I purchased a kit for the Power Supply board but someone also mentioned replacing the 2 yellow caps on the inverter board, marked NXH 470uf 35V, in picture 5. Looking at the badcaps store and digikey, I realized I don't know exactly what I'm looking for. Digikey has so many fields to filter by.

What I do know I need:
Panasonic, Nichicon, Rubycon (recommended)
470uf
35v (or higher if no 35v ??)
105C operating temperature

What other requirements...

Re: Samsung SyncMaster 2493HM black screen with power

I am having the same issues as thirdoff. My 2493hm will just go black. The Blue LED is on solid. I can't see anything shining a flashlight on it. I also get the clicking/ticking noise. I have opened it up and the caps are not visibly swollen or leaking.

I don't have a multimeter, nor do I think I have the patience/understanding to run all the tests that may be suggested. I was wondering if I should still try replacing the caps?

Background: The monitor started doing it about a week and a half ago....