Monitor switches off after 5 to 10 minutes, no lights, will not come back on. No response to front (soft) power switch, and no response to rear (mechanical) switch either. Removing the power cord from the receptacle resets the monitor so that it comes back on, runs for another 5 minutes and dies again.
Could this be some sort of an internal heat sensor or thermal fuse that is reset when the power is removed at the receptacle. (the rear mechanical switch does not reset the monitor, only removing the plug).
Also this is part of a multi-monitor setup and the other monitors of the same type continue to work just fine, Swapping video cables at the PC has no effect, so it is definitely a monitor problem, not the PC nor the driver.
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You will have to open it up and look at the main AC fuse first, then read below: 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). See example of failed 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
You need to open it up and inspect he caps in the power supply, look for bad caps with bulging tops or seals. See example of failed SAMSUNG monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums
Post back what you find so we can guide you further.
you need to repir the power supply and replace the screen. the power supply may have had bad capacitors on it . crowned or leaking. it will be cheaper to replace the monitor with a preowned on rather than repair it
satservice, What happens AFTER 15 min of FLASHING?? What did unit do or act like 3-4 weeks ago? Is the screen both BLACK and BLANK? or is screen just black and you can SEE win-desktop if you shine a bright flashlight 1 inch from screen at differnt angles? Can you use your Samsung warranty? Will monitor do same when connected to different KNOWN GOOD prebooted to desktop PC? Are you refering to the "power ON" indicator light on front BEZEL as the FLASHING thing? Need more info, but I suspect "shutdown of units "switch-mode-power-supply" due to detection of FAULT CONDITION having been detected with other circuit or with itself. Read some of my other responses in my fixya profile that deal with BLACK SCREEN repair. If this response useful, rate on fixya. 12fixlouie
andrew_da355, you should always state what kind of monitor you have!! Do you have a LCD with CCFL back-lighting? Is it still covered by a Samsung warranty?? I suspect that it could possibly be a failure of the "switch-mode-power-supply" if it is an LCD type. A technician will need to evaluate it!! Bye for now. 12fix louie.. Read some of my other responses in my fixya profile that will also clue you in to the reason your monitor has the BLACK SCREEN of DEATH and how to fix.
duffy325, Don't mess with it!!! Get SAMSUNG to give you a new or REFURBISHED unit t0 replace your BAD unit. Your unit is behaving like I would expect a 3-5 year old unit. It's got a power supply problem, not a front panel switch gone bad problem. FYI also visit YOUTUBE for the longer video clips of "LCD monitor disassembly" and "LCD monitor repair" to find out some common KNOWN failure mechanisims why they fail!! You will be amazed! With your unit's behavior I suspect a "flakly backlight or SMPS/INVERTER" problem. bye for now. If this was of some help, do rate this response on fixya. 12fixlouie