Locked out of Toshiba T4800CT
I wanted (and still want) to get a working 486 system that fits into my limited storage space so I went ahead and ordered a Toshiba T4800CT from Ebay. I thought this was a fairly safe buy because I already have a dead T1960CT for parts and the T4800CT appears to be mostly working already. The listing showed it displaying a completely black screen with plain text saying "Password = " followed by a cursor in the top-left corner. I thought this was simply a BIOS passsword which could be reset by removing the CMOS battery.
Fast-forwarding to now, I have partially disassembled this and removed the only battery I could find attached to the main board that has the CPU. It is around the size of an AA battery with "Ni-MH" written on it. A few hours later I reconnected the battery, turned the system on and found that it still requested a password. This still happens if I start it with no hard drive. I can't seem to get into the BIOS settings. I'm also unable to type anything when it asks for a password but I think the keyboard works because pressing enter causes it to beep at me. It beeps once when I press enter the first two times. On the third time, the beep continues until I press the power button.
Does this password screen look familiar to anyone and if so, how can I get past it?
Thanks in advance for any help