I have a IBM T- 30 Thinkpad and am locked out at the bios or startup. Black screen with padlock and flashing c?

ibm t-30 thinkpaD LOCKED OUT AT START UP ,BLK SCREEN AND PADLOCK WITH FLASHING CURSOR IS WHAT THE SCREEN LOOKS LIKE AND CAN'T GET PAST THAT. ANYONE HELP WITH BACKDOOR PWORD WOULD BE NICE ,THANKS