I am having a similar problem with my monitor (Acer AL1511).
I turn it on, and although the PC is booting up fine, the image won't stay on the screen for more than a second at a time. However turning the monitor on and off repeatedly (currently around 25 times!) I eventually get it to work. It doesn't then have any problems until next time I turn it off.
It does sound like a 'backlight converter' issue as previously mentioned in this post, since I can see my login screen very faintly from certain angles.
It used to just take 6 or 7 switch-on-switch-offs to make it work, now I'm up to 25 but might be worth a shot for anyone who can't afford a new monitor at this time of year