I had this problem with my Videosonic VE170b monitor: after boot, monitor comes on for just about 1-2 seconds then goes
Hitting one of the buttons on the monitor (I think auto-adjust) would bring the monitor back again, but for only the same 1-2
seconds. Repeat hitting the monitor button would again bring it back, but only for 1-2 seconds.
SOLUTION: Mine was solved by changing the display color quality from high (32-bit) to medium (16-bit).
(YES, I had to repeatedly hit the monitor button and quickly move the mouse to do these steps, which was quite
ALT-CLICK on a blank spot of the desktop; from the dropdown menu, choose PROPERTIES.
Click on the SETTINGS tab, where you'll see COLOR QUALITY dropdown box. Mine was set to High (32-bit).
I clicked on the dropdown arrow and chose MEDIUM (16-bit), and this solved my problem.
Hope it solves yours!