BIOS detects CDROM, then 5 seconds later it doesn't ... EVERY TIME!!!

Maverick2002

Diamond Member
Jul 22, 2000
4,694
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Ok, this blows. I'm putting together an older system (Abit KT7, Duron 650, 384mb PC133, IBM 30gb HDD, etc). All components worked before and they still work. The problem is very awkward though: when I go into the BIOS, it tells me I have my HDD as the primary master and my CD-ROM as the secondary master. This is true every time I go into the BIOS.

But, when the system first powers on (and you see the black screen, with CPU speed, amount of RAM, etc), the only thing it detects is the HDD. Same story when the next screen comes up (the one that tells you what your IRQs are, etc; the CD-ROM doesn't show up). The CD-ROMs spin up, the light comes on, they're obviously doing something.

I tried two different drives, both of which work in any other system.
I tried switching IDE channels, even putting it to slave and adding it to the primary IDE channel, as well as any imaginable combination of those.
I used different IDE cables, 40 pin and 80 pin, rounded and flat.
I cleared the CMOS several times.
I tried every boot order combination (including all CDROMs with "other boot devices" disabled; all I got was a boot disk error).

WTF?!?!?!??!?!

What could it be?
 

corkyg

Elite Member | Peripherals
Super Moderator
Mar 4, 2000
27,370
240
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You did everything possible as I see it - but there's one more thing to try. Put in a different CD ROM drive and see what happens.
 

LordAccord

Senior member
Jan 17, 2002
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are you having bios detect the cdrom as a permanent device, as in "not AUTO detect"... because most CDROM drives wont show up in the CMOS checkscreen screen unless its set on Auto, whereas HDDs usually do either way.

LoRdAccord