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The 4540s has very easy access to its "changeable" components (memory, hard drive, wifi card, wan card etc) and there's a few good video guides on the HP site on how to get to and swap out these parts here.................
http://h20464.www2.hp.com/resultsCS...455&MEID=0B16F6F9-A9BB-4275-8FB4-57CCA3816318
Those are useful but don't deal with CPU changes, so here's how to do it in easy steps.
Firstly, these components are very susceptible to damage from static electricity, don't wear nylon clothing and only touch parts by the edges, don't touch the pins/connectors.
Note, the manual states that to remove/replace the CPU you need to remove the keyboard, you don't!
1 remove the power cable, battery and base plate, see video above.
2 remove 3 screws in metal shield, see picture below. The middle screw is deep in a recess, once its loose, just leave it in the hole.
3 carefully twist the shield slightly and remove it to expose the heatsink/pipe and fan.........
4 remove the single screw holding the fan and lift the fan and place it above the ram (the manual says you need to disconnect the cable, you don't)
5 unscrew the 4 screws securing the heat sink/heat pipe to the CPU socket, lift it carefully up on the left side first and it will come out from under the case on the right side.
6 unlock (anti clockwise/counter clockwise) the single ZIF socket clamp screw (it will "click" when loose) and lift out the CPU (it must be TOTALLY free to move or you haven't un-clamped it properly)
7 replace the CPU with your new one making sure its located correctly (one corner has a missing pin) and it should drop into the ZIF (zero insertion force) socket, close the clamp screw until it clicks. Apply a little heat transfer paste to the CPU and replace the heatsink/pipe. Refit the fan and its screw. Refit the shield, base cover and battery. Reboot and enjoy.
Your Mac system may need adjustment, be prepared to boot with Unibeast and use Probook Installer to select your new CPU support files.
Windows will want to reboot to add drivers, Linux will just work!
Pete
Don't know if this should be in Workshop, but as it relates only to the 4540s Probook I put it here.
http://h20464.www2.hp.com/resultsCS...455&MEID=0B16F6F9-A9BB-4275-8FB4-57CCA3816318
Those are useful but don't deal with CPU changes, so here's how to do it in easy steps.
Firstly, these components are very susceptible to damage from static electricity, don't wear nylon clothing and only touch parts by the edges, don't touch the pins/connectors.
Note, the manual states that to remove/replace the CPU you need to remove the keyboard, you don't!
1 remove the power cable, battery and base plate, see video above.
2 remove 3 screws in metal shield, see picture below. The middle screw is deep in a recess, once its loose, just leave it in the hole.
3 carefully twist the shield slightly and remove it to expose the heatsink/pipe and fan.........
4 remove the single screw holding the fan and lift the fan and place it above the ram (the manual says you need to disconnect the cable, you don't)
5 unscrew the 4 screws securing the heat sink/heat pipe to the CPU socket, lift it carefully up on the left side first and it will come out from under the case on the right side.
6 unlock (anti clockwise/counter clockwise) the single ZIF socket clamp screw (it will "click" when loose) and lift out the CPU (it must be TOTALLY free to move or you haven't un-clamped it properly)
7 replace the CPU with your new one making sure its located correctly (one corner has a missing pin) and it should drop into the ZIF (zero insertion force) socket, close the clamp screw until it clicks. Apply a little heat transfer paste to the CPU and replace the heatsink/pipe. Refit the fan and its screw. Refit the shield, base cover and battery. Reboot and enjoy.
Your Mac system may need adjustment, be prepared to boot with Unibeast and use Probook Installer to select your new CPU support files.
Windows will want to reboot to add drivers, Linux will just work!
Pete
Don't know if this should be in Workshop, but as it relates only to the 4540s Probook I put it here.
