Thomas already wrote: HDD died. Controller died. Contoller sitting loosely. Cables sitting loosely. Powersupply becoming weak.
What roms you have? Do you have hd instaldisks?? After you have checked that everything is sitting nicely, insert hd install disk and check does it found hd
I am leaning towards a dying power supply. (20+ years old after all!) And if you live in a city or town that has dirty power source like I do, it is bound to soon! Even with surge protection. I used to use hospital grade surge protection with the A2000.
My A2000 is no longer finishing the boot up from the HDD. I concluded it to be the PSU from process of elimination, since I do not have multi-meter. Up until a few weeks ago it booted up fine. Then the next time only after I unplugged the power to the cd-rom drive. Now it only boots to a partial HDD boot even with the disconnected power cable to the CD-rom. I could next remove the old Supra ram expansion card and see if it completes the HD boot.
Otherwise what Thomas said are the other logical possibilities
