The monitor goes back after not in use for a while or turned off and back on. I have defeated the power saver mode and it stills does it. When it goes black, I must turn it off and on several times and it will finally stay on. When I first turn it on, the screen comes on for a second or two and then goes black.

SOURCE: Monitor going black

Sounds like cold soider joints on your video board. If you take apart the lcd screen and get to the video board, theres 4 capasitors with cooper coils around it. you can add soider to it. theres 2 pins for each. I fixed 15 or more for that same model. Its a known problem with that model. Hope it wworks for ya

SOURCE: Good picture for 30 seconds then screen goes black with a faint ghost of the image

I have an IBM LCD that shows perfect image for 15 seconds or more and then goes blank. any suggestion how I can pin point the problem.

SOURCE: Monitor goes black but green light still on.

The problem with the Mag lt916s is that it is made with cheap capacitors. If you are interesnted it is a cheap and easy fix. Open it up, which is the hardest part. And replace the six 470uf 105 degree 25v capacitors and maybe even the smaller 220uf one next to them. You will see a bump on the top of bad capacitors most of the time. There are some videos to watch on Youtube showing you how to make the repair.
Good luck

SOURCE: monitor black screen

I experienced a similar problem with my MAG LT776s. As a "band-aid" fix, I have found that if I turn the monitor brightness to near zero my problem is minimized. Meaning - the monitor goes on after a little wait (~ 20 sec) and will stay on.

The trick is to turn the brightness down when the monitor is black and you cannot see the screen menu. In my case I:
- turned the power off and then back on again. This allowed the monitor to be on for about a second when I can press Menu and see that the manu had actually come on.
- the menu will start in the brightness setting. Even if the monitor had gone off by now, press menu again to enter into the brightness setting.
- press Down button many times to ensure the brightness is down all the way or nearly all the way since you will not be able to see the setting now that the monitor is off.
- press Menu button again to leave the setting menu.
- Turn off, then back on again.
- worked for me - monitor came on and stays on.

SOURCE: moniter flashes off

A lot of times this is caused by bad caps on the power board, at least with certain other brands. Mine did this when I got it as a DOA donation. If another monitor works fine on your PC as suggested, it would be worth your time to open up the back and check for any capacitors that are swollen on the top or bottom or leaking (worse). If you don't want the hassle of replacing these or are unsure of how to solder/desolder, please don't just throw it away... they are filled with mercury vapour and should be disposed of properly, or FIXED. There ought to be someone local who knows how to do this... if not, hit me up.