Samsung Syncmaster px2370 monitor goes into sleep mode after windows starts up.?

Effectively just 10 minutes ago I was via my pc, I was required to use that bathroom therefore I allow my monitor on plus went.After i came to come back the watch was flickering ( want it does around sleep mode)
After messing around with it.I discovered that them works completely when my computer begins up, but immediately after loading and planning to my pc, it switches from analog in order to digita, then extends back to sleeping mode.
This randomly occurred, noone has touched the item.
I have had that monitor pertaining to about SEVERAL months.

yeah.