Have you ever been able to get into the BIOS or is this a newer problem? Also, just to confirm you are pressing F2 as soon as you turn it on, even if you don't see anything on the screen? I've noticed that some machines don't immediately display anything so waiting for a picture means you actually miss the opportunity to enter setup. Not sure if that is the case with the g73, but worth mentioning.
When you say no updated BIOS do you mean that one is not available or that you have not updated it at all?
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…