|When you first boot the computer do you see anything on the monitor? |
If the monitor is OK you should at least see a NO SIGNAL message.
Did you make any changes to the computer just prior to this change?
Are you sure you are connecting the monitor to the right port?
Now to answer some of your questions.
1. If you have a WiFi card or dongle you should be able to use it on a different computer.
2. Yes you can access the hard drive by using a USB adapter that can connect to your laptop.
I suggest you buy the adapter linked below. It will work on any IDE or SATA 5.25", 3.5", or 2.5" optical or hard drive. Very handy item. Just click on the Blue link.