INSPIRON 6000 Monitor, Internet port, & keyboard

Help,

 

1. During time system is running, my monitor will go blue and freezes everything up. I loose my work and have to do a hard boot to get system to clear. The issue with the screen has been going on since I got it. I hope it can be fix or please consider replacing it.

 

2. My Eternet Internet port stop working, so I switch to the USB port to get onto the Internet. What would cause this?

 

3.  The keys on the key board keep coming off and I cannot get a couple of them back on. I am in school and this is not helping me. Please fix my notebook.

 

Thank you,

Paula Rouse