Once the top casing is removed, disconnect the fan cable and unscrew the heatsink to clean or replace the thermal paste.

If you want, I can produce:

The ProBook 450 G0 features a user-accessible service door that provides quick access to frequently upgraded parts. Service Door

Probook 450 G0 Disassembly - Hp

Once the top casing is removed, disconnect the fan cable and unscrew the heatsink to clean or replace the thermal paste.

If you want, I can produce:

The ProBook 450 G0 features a user-accessible service door that provides quick access to frequently upgraded parts. Service Door hp probook 450 g0 disassembly