You may be able to unlock it. Start by going to www.lenovo.com and download the Hardware Maintenance Manual for your PC.
However there is a lock so deep in the hardware it requires a system board change to fix it. This was done in order to turn stolen computers into scrap and thus not worth stealing.
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April 2008
Automatic Answer
While you wait for answers, we may have found some information which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix notebooks/laptop pcs.