Main ISSUE: Monitor screens flickers then turns red then goes black but not anymore, Once turned on the monitor it's intense color red and goes black after 1-2 seconds or less.

Let me further give you details below about how and when it happened further relative issues.

First of all i have to mention that, I am using a DELL 1545 Laptop, And it's screen card or something inside got damaged because of a kitten. Ok this is not the point,The point is so we used an old monitor (Flatron L1730S) to duplicate the screen the laptop to the monitor. It was all working fine it have been working for many months now. Then one night i was playing a videogame and left it open. went away to do something, then i came back seeing the screen black and the light that indicates the power is whether open or closed is opened. I tried lowering the brightness and it helped for a while. It stayed then after a day the INCIDENT occurs again. And the windows got damaged. So we FIND it struggling to make a NEW windows WITHOUT a monitor,somehow we managed to get it and suddenly the monitor's working all good. then the day after it happened again. But it flickers and goes a bit red then went black, then i tried changing the (Flatron F-Engine) From normal to Movie. It worked it stayed, then after a few hours it came back. It doesnt seem to be a problem with the wire that connects from the laptop to the monitor but maybe the monitor itself, or the power wire that connects from the monitor to the plug. I am also guessing the monitor is overheated? Help please.The monitor is on it's last legs...swap another one on there to confirm...