My Samsung Syncmaster 943BX will not wake up from sleep mode sometimes. Sometimes it comes right up, other times it may be 5,10,20 minutes before the display wakes up
Computers & Internet - Samsung - SyncMaster - SyncMaster 913V 19" Flat Panel LCD Monitor
Answers & Comments
You probably have caps failing in the power supply.
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed SAMSUNG monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://www.badcaps.net
http://en.wikipedia.org/wiki/Capacitor_plague