i would say there is no signal getting to your monitor, check the cabling and check what source is being used on the monitor usually looks like a suqare with an arrow pointing into it.
------------------------------Intel core 2 duo e6750 @ 3.3ghz
Asus P5N32-E PLUS SLi nForce
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Reply to fowang
If the computer is going to sleep / hibernating normally, then you don't have to do anything. If the computer is locking up / rebooting itself, then you have an issue that needs to be addressed.
------------------------------Desktop: Windows 7 Professional 64-bit; Intel Q6600 CPU; E-VGA 780i SLI motherboard; E-VGA E-GeForce 8800GT; OCZ Vista 4GB dual-channel kit; Ultra X2 750W power supply; 2 x Seagate Barracuda 7200.11 500GB in RAID 0. Laptop: Acer Aspire 8730-6314;
Reply to Zoron