I have a gigabyte ga-5486al board, and it reboots just fine for me since
day one. Verify that you have jumpers set correctly for your cpu type.
> hardware: i486/100, 2 x teles ISDN, Cyclades 16Port(pci), aha2940 and a
> noname videocard (pci) and a ne2000 clone.
Am5x86-160, ide disk, ne2000 clone.
Marek