Hello everyone,
I'm having same problem here but with different model.
I bought Aspire F15 two months ago. At the begining it worked just fine, on my lap, tilted and moved with no problem at all.
A month later it started to suddenly shutt down when moved or tilted (only weh unplugged).
sometimes even when staying still on a steady table, it fails to start up windows and goes off right at ACER logo screen (only when unplugged).
I looked up for it but couldn't find any solution anywhere.
A friend told me that this is a protective action that was designed specially to protect the pc. (what an action, huh?)
as a practical solution I'm gonna stick a peice of carton or sponge under the laptop and see if helps.
if anyone has a solution for this problem please share.