Have you replaced the cable for the Hard Drives! One of the cables may have
a bad connection. Also you may want to check the Voltage of the Power
Supply, or try with a known good supply.
Steve...
>
> Decided to switch on a trusty 486/DX100 and got this:
> Disk I/O error-replace the disk
>
> Decided it was time to update anyway, so replaced the motherboard with
> an Asus P55
> Disk I/O error
> replaced hard drive
> Disk I/O error
> replaced floppy drive and tried to boot from there
> Disk I/O error
> getting desparate, replaced CPU, RAM, and even video board
> Disk I/O error
>
> There's nothing left except the box itself, mouse, and KB
>
> What the devil is 'disk I/o error'?
>
> I don't have anything left to replace...?
>
> My NEW Windows95 Crisis Center:
> http://computerhelp.org
>