HP ProBook 450 G2

Carefully remove the main battery.

Locate the screw on the bottom side.

Unscrew and remove it.

Carefully take off the two plastic covers.

Locate the three screws marked with a keyboard icon next to them.

Carefully unscrew and remove each of them.

Take a thin, flat tool, such as a guitar pick.

Gently insert it at the top edge of the keyboard.

Carefully slide it along the edge until the keyboard starts to lift or "pop" out.

Do not immediately pull out the keyboard.

Carefully locate and detach the keyboard cable connecting it to the motherboard.

Locate the screw marked with a CD icon next to it.

Carefully unscrew and remove it.

Carefully pull out the CD-DVD unit.

Locate the four screws marked.

Carefully unscrew and remove each of them.

Slide the disk to the right and then carefully pull it out.

On the bottom locate the 11 (M2.5x3) screws marked and 2 (M2.5x6) - picture 1.

Carefully unscrew and remove each of them.

On the bottom locate the 6 (M2.5x6) screws hidden under the rubbers - picture 2.

Under the keyboard locate the 3 (M2.5x6) screws.

Carefully unscrew and remove each of them.

Detach all cables connected to the motherboard.

Carefully separate the covers.

Be aware that there is an additional cable underneath. Detach this cable with caution.

Locate the five screws marked.

Carefully unscrew and remove each of them.

Detach all cables connected to the motherboard.

To more easily access and detach the cables, gently pull out the motherboard a bit.

Locate the six screws marked.

Carefully unscrew and remove each of them.

Now you can take off cooling pipe and clean it.