you can cancel the installation process by pressing F3.
by that you leave the installation and return to a DOS prompt.

301-keyboard error
I9990305-No bootable device.

it just depent on the usage of the TP.
power usage and loading the batterie increases the temp of the ac adapter.
it also depend on the parts in the TP. everyone uses a certain power
i'm using a 3.36A ac adapter and its getting really warm while using the TP and loading the batterie(s)

regard