You need to replace the bad CD, unplug the battery, wait long enough for any transient juice to clear (15 mins - 1/2 hour), re-assemble the whole thing. Don't mess with the disk drive -- that should have a partition where the System info is (used to be ROM BIOS, but not these days)
Or just take the who thing to the seller -- was this new, retail?
I took the computer into the repair place in town.
Diagnosis, dead.
They think the system board had given up the ghost.
Was real happy to hear that, mind you I didn't spend a lot of money on the computer, but still more than I wanted to waste like that.
Semper Fi