Sometimes you need to hit the esc key to bring up POST information.
Also, usually you can pause the POST process by hitting the Pause key if the system POSTs to fast.
The common keys to access the BIOS are F2 and Delete. When powering on the laptop, tap the F2 key continuously. If that fails, then try tapping the Delete key continuously. If both of those keys don't work, try all of the F keys (F1, F2, F3...) in the same way.