BIOS fail to find HDD after resetting

The HDD is working ok, but after resetting, BIOS cant find HDD.
Cant find out where the problem is.
Help
Thanks

HI,

Could U be a bit more specific, pls? what does it mean that the HDD is working OK (I mean how do U know, if it is not shown at POST)?

pepe

Hi,
After powering the PC on, the HDD is shown at POST and Windows starts,
but if I (or application after installing) want to restart PC, the HDD is not
shown at POST and Windows doesnt start (message: disk boot failure...).
No matter what way I restart the PC(Windows, Ctrl+Alt+Del, Reset switch)
its always the same. I always have to turn PC off and back on, to normaly
boot system. I have tried to swap HDD, but its still the same problem.
I have tried to setup HDD delay - nothing.
MB: Gigabyte GA-945P S3
HDD: 1. Samsung SpinPoint 80GB SATA2
2. Maxtor D.Max10 80GB SATA

Thanks

sounds like a motherboard hardware issue

Have you tried to change the PSU?

so Ive swap the PSU and nothing changed
1. PSU: OCZ ModStream 450W
2. PSU: Seasonic S12 430W

Another thing is that if I save changes in BIOS, it will find the HDD
but if I leave BIOS without saving it wont find...