PowerConnect 5324 firmware issues

Inherited a 5324 that doesn't have any error lights on it, only FAN and PWR are lit green.The switch passes traffic, but I cannot reset it to factory defaults nor can I log in via http. I can hyperterminal into it, and the first two lines of POST are fine. UART Channel Loopback Test PASS Testing the System SDRAM PASS after that, I see ascii art, I.E. I see gibberish characters. I've tried doing a ctrl d, I've tried ctrl f. I'd like to try to flash current firmware into it but without being able to get a valid cli and not knowing the IP address for web management, I don't know if that is possible. If not, I'd like to find out how much it would cost to get it fixed.