Well, if the light on the monitor won't come on when it is plugged in to power and you have the power button on, it's probably dead. Otherwise, you may have a loose cable at the monitor or in back of the PC.
Otherwise, I would totally suggest upgrading to a bigger monitor. Your monitor at 15" diagonal and 1024x768 is rather small for desktops today. You can get a decent 17" or 19" LCD for under $100.
Newegg has a 18.5" diagonal for $99.99 with free shipping.
Most monitors have a power light. When you first plug in the monitor to power, the light will come on in an active state, but will usually change color when no input / video is detected.
Some things to check:
1) Look for any kind of light when you plug it in.
2) If no signs of life from above, double check the power supply. Make sure the monitor side of the cord is plugged in. If it seems to be a bit loose, the jack may be loose from the circuit board.
3) Check the AC cord going to the power supply. Make sure it isn't unplugged, and that the power strip it is plugged into is turned on. You would be surprised....
If your power cord goes straight from AC to the monitor (no box in between), then try swapping the power cord from your computer to the back of the monitor. If it works then, you may have a bad power cord (easily replaced).
4) If you have another monitor, connect it to the computer. If this monitor shows signs of life, like an image as computer starts, then it may be safe to assume that the other monitor is bad if power cord / power supply is in good shape, and the "bad" monitor is reconnected and appears to be dead again.
5) There is a small chance that the power supply, if used, has become defective / damaged. If the monitor is not very old, and the retailer you bought it from still has the demo model, take your monitor to the retailer and ask them to plug it into the power supply of the demo unit.
If still doesn't work, then contact Samsung for warranty / out of warranty repair. 15" LCD monitors are pretty cheap now, you may find that replacement is much cheaper than repair.
Generally, if the power light (LED) doesn't come on and there is no screen display with or without input signal, it's dead. Probably a failed power supply.
Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
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the display in the monitor is like a pedestrian line in different colors.like a rainbow but the line colors are straight.
any lights coming on such as the power or standby light any clicking soulnds? if so than you may have a relatively cheap fix but if you are not comfortable opening one up and doing the work yourself take it to a pro or buy a new one
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