HP 24 all in one back cover removal help model: 24-dd0006:ANSWER

[ifixthings]

This is a very late answer to an old 2018 post. Hope this helps. Seems HP is not good in giving good instructions back in 2018.

Link to original post 

I was scrapping one of these and found no help from HP or anywhere else.

Here is the steps.

Remove base

the white cover pops off and using a thin pry tool will greatly help. You may need to move the base back or forward to be able to get the pry tool in.

Next there are two screws that do not come out and these need to be unscrewed. again you may need to move the base stand around to get your driver in there. Stand should now slide out.

Next 

flip the unit over and take off the sound grill. This was very hard to remove but a pry tool works and it is just clipped in. Be sure to be careful because to overlaps the screen so try to stay near the bottom left or right corners so you do not damage the screen.

Once the cover is off now you should see the screws. There are 14 that I counted. They have a symbol that shows the screw is required to be removed.

BE CAREFUL REMOVING THE SCREEN THERE ARE VERY TIGHT WIRES YOU WILL BREAK IF YOU OPEN IT TOO QUICK

once all screws are done it will take some force but the rest is just snapped in place. Carefully pry it up from the bottom where the screws were. Be careful there are tight wires that you could snap.

Once those two wires are taken off carefully. You can access the M.2 SSD here and it is labeled.

Have fun also the M.2 standard is 2280 just to confirm. It also has a second DIMM slot for RAM upgrade.

Remember you do this at your own risk. They designed this PC to have a high likelihood of breaking if you do not use their approved repair channels. Goes against everything DIY and right to repair. But I hope this helps someone out there.

Happy DIY!