power switch problem in Sony PCG-V505B series notebook

[amie654]

I recently acquired a Sony notebook with a power switch malfunction due to switch de-assembly during previous owner's use.

I'd appreciate a brief tutorial from someone experienced with re-assembling the power switch, to include amount of case & other teardown necessary to do the job. I'm a newbie with tools, but no experience. Your help would be greatly appreciated. Thank you for looking here.