Ok so my parents just let me screw around with an old computer. Its an old computer with Windows 95. I keep trying to put in CDs but it won't read them. The drive opens and closes but nothing happens. The light by the CD slot won't turn on. I don't know if its broke or what. I put a CD in once and it worked but I don't know what I did. HELP!

Make sure all the wiring is in. You might have the power cable in but not the cable to read it. Although, I don't get why it read the disk once but not anymore. Just keep trying and you will figure it out eventually. Try changing the CD drive.
~Loui

Open computer and check the gray cable to make sure it is attached firmly, take out and reseat the cable to see if this would help