Some of the keys on my keyboard are sticky. Is there any easy way to fix this?

I need to know the serial number of my laptop, but I'm not sure where to look. How can I find it?

The display on my laptop is not turning on. It stays black, no matter what I do. How do I fix this?

Here is a useful link for cleaning keyboards safely: http://www.howtogeek.com/65073/how-to-thoroughly-clean-your-keyboard-without-breaking-anything/

If your keys are sticky, try dipping a cotton swab in isopropyl alcohol and cleaning the affected area. If the problem persists, try gently removing the individual keys and washing them in an alcohol solution before replacing them.

If the screen is black and unresponsive, the display may be disabled. To enable the display, press and hold the (Fn) key on the keyboard, then press (F2) while holding the (Fn) key. If this does not work, the screen may be broken. Follow this guide to replace it.