1. Connect your rs232 Cisco cable (The blue one with rj45 connector => DB9) to pc and start hyperterminal / putty / screen / mincom etc..
(Parameters: 9600 Baud, N, 8, 1 (NO-Parity, 8 Bit, 1 Stopbit) Flow Control (Hardware, Software) AUS)
2. load the right config register from flash:
CONF-REGISTER:
cisco-01-0x2142-noram-empty
cisco-02-0x2102-normalconf