Guys, I hope that you can help me with a non HCPC problem. Ive tried on other hardware forums, but its baffled the experts there, so Id thought Id try here! I've replaced the mobo in a Compaq Presario 5146EA (microATX) with an ASUS A&N8X-VM as it was spontaneously rebooting and everything I checked (CPU, fans, memory, PSU etc) didnt resolve the issue. It was over 2 years old, so it was due an upgrade. I have a Pioneer 106 DVD RW drive and a LG CED-8120B CD RW Drive both jumpers set to CS. The BIOS correctly sees the Pioneer as Master, but it doesnt detect the LG. If I change to MA and SL, it still doesn't make any difference. I had a spare DVD ROM, so I swapped the LG CD RW drive with it and the BIOS detected it - so it appears to be an issue with the CD RW drive which worked fine with the old mobo I replaced with the Asus. To make sure that the LG CD RW wasnt faulty, I plugged it into a Compaq Deskpro EN at work and it was detected by the BIOS & OS. While it was up and running I decided up upgrade the CD RW's firmware from 1.09 to 2.00. It was still not detected by the Asus after the upgrade. Ive also tried it with the LG as the only drive set to MA on the secondary IDE channel. The Bios of the Asus is version 1008 08/15/2003. Does anyone have any ideas what the problem is??? Thanks, David.