Short pins on the bios chip. I have done this on T42's. I assume it will work on T30's as well. You'll have to search the internet for which pins to short (usually pins 5 & 6 or pins 7 & 8), but you short the pins together and turn the machine on. Be careful! Do it at your own risk. Once you are into the BIOS, you cancel the password settings and save.
SOURCE: locked screen
emove the CMOS battery, POP will be vanished
right away. But after that, you have to enter BIOS to set the
time/date, otherwise laptop won't boot.
if that doesnt work goto http://www.passwordmethod.com/
SOURCE: IBM ThinkPad R50e
So wait, its asking for a BIOS/CMOS password? If so, one thing you can try to do is remove the CMOS battery. The battery is about the size of a nickel and can be found on the bottom of your laptop. You'll have to unscrew a few things to find it. Once you do, take extreme precaution when touching anything inside the computer. I would recommend getting an Anti-Static Wrist strap (sold at Best Buy). Once you locate the CMOS battery, take it out. Keep it out for about a minute and then put it back in and close everything back up. When you do this it usually resets the BIOS/CMOS password if there is one. Hope this helps!
SOURCE: ibm think pad r52
Your computer is BIOS password locked. Its complicated as hell and really not meant to be done by an amateur but this website explains how to recover the password that seems to have been accidentally set.
Site: http://www.security-forums.com/viewtopic.php?t=23102
SOURCE: My IBM think pad T20 has lock when turning on and
How did you set the password?
Did you buy this laptop from someone?
If you did you need to get the password from that person.
There is no backdoor password available and removing the BIOS battery will not remove the passowrd because the password is stored on an EEPROM chip.
You need the password to boot up the laptop and then into the BIOS configuration to remove the power on password.
SOURCE: ibm think pad t20 w windows 98 is locked
Try the link . . . www.laptop-problem-solution.com
For find your best solution.
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