Standby doesn't work

[User1001]

I have been using the S3 state of standby for about a year and for some reason the computer wouldn't resume from the S3 state and would just restart. I didn't install anything new (hardware or software). I was due for a clean install anyway so I backed up my data and did a clean install of Win XP home edition with the same results. Any ideas on how to fix this? Thanks in advance.

System:
3.0C Ghz P4 800 mhz fsb
1 GB Corsair XMS DDR 400
Geforce FX 5800
Gigabyte 8KNXP motherboard (875 chipset)
Western Digital 36.4 GB 10k RPM Raptor
350 Watt Antec PSU
Antec Sonata Case

 

[LiLithTecH]

If you haven't done so, make sure to install Service Pack 1 as the fix
for this condition is included.

 

[ahurtt]

Check for new versions of BIOS and ACPI drivers for your motherboard. Look in the release notes for any you find and see if the problem is mentioned.

 

[User1001]

I've updated everything since. It worked fine for a long time. It just stopped working.