Crash/Restarting on hitting desktop at startup

[GNJF]

My PC boots up, loads up my desktop and all my startup programs and then my monitor goes black, sometimes it restarts immediately, sometimes my monitor will be stuck in sleep mode while my pc is still on. This has been happening a couple of weeks now.
I've check all over and so far the only "solution" is to turn off the power and remove the power cable from the tower for a few minutes, this only works temporarily, the next day I power it up, it had this problem again.

Help.

 

[EzRiIgK]

Sound like it may be the transformers in the monitor starting to go. Is it possible for you to try another monitor? If so give that a try and reply.