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Laptops often do not have a dedicated CMOS battery, but use a hardwired device which you have to unsolder and solder back. You don't want to do that without some decent experience. There are two basic kinds of passwords that will be prompted for by the
IBM BIOS, computer and HDD. (You can tell the difference by the icon
prompt). If this is a HDD password, there are no options for recovery in
the US. Federal laws prohibit possession of the software to access the
secure portion of the disk. The computer passwords are also not able to
be cleared locally. The unit can be sent to an IBM's maintenance and
support center and they will either
clear the PW or in some cases replace the planar. If you just purchased
the laptop, contact the previous owner for the passwords. If not, then
sending it in for maintenance is your best bet.