Download it. Click the blue link “Hardware manual” See page 75.
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Download it. Click the blue link “Hardware manual” See page 75. It shows the disassembly.
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If you removed all the screws all that could be holding the pieces together are plastic locking tabs or ridges, adhesive and “gunk” formed from oils, vapors, food and dirt that got in there over time. I’ve found a LOT of “gunk” in computer keyboards and in laptop that have fans.
Most Lenovo computer manuals are available for download, free, from Lenovo website. Here’s a shortcut to the one you need.
from: https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-p-series-laptops/thinkpad-p50?linkTrack=Caps%3ABody_BrowseProduct&searchType=0&keyWordSearch=
Download it. Click the blue link “Hardware manual” See page 75.