Removing the memory cover
The procedure is very simple. Unscrew the five screws and then use a plectrum to force the edges of the laptop to remove the cover.
I recommend that you keep the screws in the position where you found them to be sure not to miss to position them during reassembly. In any case, I have marked with different colors with the different screws that you will encounter.
Removing hard drive
Removing the optical drive
Removing the RAM
Removing wireless card
Removing the keyboard
On the other hand, we have to remove the keyboard. You can see small pieces of plastics. They are still going towards the outside to make sure to unlock the keyboard. I have marked their position in the picture below.
Warning: when you pull the keyboard towards you do not crush the ribbon cable that connects to the motherboard (you could ruin the keyboard and the motherboard connector).
At this point, you have to unscrew all other screws that were hidden by the keyboard. In addition, you have to disconnect all the cables from their connectors flat.
That’s left to do now is insert a shim between the top cover and the bottom cover of the laptop. I used the usual guitar pick.
There are joints to push that I’ve marked in the photos below.
I also put a photo of the view from the rear top cover should you need to replace the power on or output optical drive and one with all the screws ordered.
At this point, the motherboard is off quite easily by lifting it from the right side.
Removing the CPU
For more guides, check out the Acer Aspire 4820TG device page.