Can't get past BIOS menu on Gateway Laptop!!!

I just went to start my Gateway laptop this morning after leaving it shut down and unplugged for the whole weekend. The first time I started it up, all of the lights came on and the fan started like normal but there was no display on the screen. I went online (on another computer) and found instructions for a hard reboot (I think). Basically, I unplugged it from its power source and battery, pressed the on button for about 30 seconds, then started the computer with just power, shut it down, inserted the battery, then restarted. After all of that, the screen now works but I cannot get past the Gateway screen that tells me to press F10 for the boot menu or F2 for the BIOS menu. It does nothing when I press either of these. I will admit that I am rather a novice when it comes to tech support so if someone could help me out in the simplest terms possible, I would appreciate it. Thanks!

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