Yep you could also try to disconnect all cables from the CD-ROM drive wait a few seconds and reconnect them in case the firmware is frozen. Trying a firmware upgrade is also a good idea if a newer version is available.
Edit: Oops sorry forgot it was a laptop. In that case, you can just remove the battery wait 30 seconds or something, you can also hold the power button while the battery is removed this way it will empty the capacitors just to make sure no power is left. And when I think about it in a desktop computer you could also simply unplug the power cord from the PSU and wait a little bit and it should have the same effect, no need to disconnect any cables internally.