Have you checked the keyboard ribbon cable that is connected to your motherboard? If you use an external keyboard as well and try f2 and f12 on it you might be able to find what the problem is as well, I also recommend trying the DEL key just incase too.
+
+
Hope this helps!
+
+
+
+
After edit: It just dawned on me too that if it is hanging on the acer boot logo then there could be something wrong with the internal battery so disconnect the battery if you can and power on with nothing but the power cable, if that is still being an issue then i recommend disconnecting whatever internal storage there is and trying to access the BIOS after doing so. If that doesn't work then you might be looking at a faulty BIOS chip (if worse comes to worse of course).
Hi there,
Have you checked the keyboard ribbon cable that is connected to your motherboard? If you use an external keyboard as well and try f2 and f12 on it you might be able to find what the problem is as well, I also recommend trying the DEL key just incase too.
Hope this helps!