Bridgeport EZ Trak CMOS error, clock battery replaced, still nothing

Hi, we replaced the clock battery but the attached black screen appears, tried using keyboard to get past set up etc, still nothing, do anyone have an idea?? thanks

alittle late for u but its dead, either pc, or cant access hd, or HD is dead. Regardless, they dont repair, its already 25+ yrs old. Old PC cant recognize new HD.
Replace PC with new DOS compatible: need moderate level performance. best replacement is passive backplane and single board computer.