ThinkPad Hardware Maintenance
IBM/Lenovo have excellent HMM for
every ThinkPad model
The Hardware Maintenance Manual is
your best friend when working on any ThinkPad
HMM cover a lot of important topics,
they also show you step by step screw by screw how to remove and
replace TP components, even down to the number and size of each screw.
the Hardware Maintenance Manual (HMM) for your TP model
The link above is to the Lenovo site, if it
doesn't work, don't panic, it isn't broken, their site is shut down
daily for maintenance and at those times they display spurious
messages like the page you requested cannot be found, wait a good
while and try again.