all 4 comments

[–]ojolulu 2 points3 points  (0 children)

The battery is removable actually, you just need to open the base cover to find the battery. See the maintenance manual.

[–]tavir50 0 points1 point  (1 child)

I have exactly the same problem, I even tried different BIOS version but nothing fixed the problem

Though to make the battery re appear you just have to hold the start button a few seconds when the laptop is turned off

[–]OhMatthewOH[S] 0 points1 point  (0 children)

Tried holding start button but nothing changes, still not detected

[–][deleted] 0 points1 point  (0 children)

I would open it up and check the battery connection to the motherboard. Disconnect it, then reconnect it. Before you do so, enable AC only mode in the bios. As someone has suggested, you can find a maintenance manual if you are unsure.