The following procedure will test if your notebook can start from a bootable DVD disc in the optical drive - the advantage of trying this is that it will rule out any possible Windows driver error as the optical drive drive is under the control of the Bios when starting the notebook. So if you find that the notebook will not boot from the DVD, then it's almost certainly a Hardware fault in the drive itself and it will need to be replaced.
Using another PC to create a Windows 7 Rescue CD and DVD. Download the relevant ISO from the link below.
You need use an application such as ImgBurn to correctly burn the ISO to a CD and then also burn it to a DVD - a guide on using ImgBurn to write an ISO to a disc is Here.
Once created, shutdown the notebook. Tap away at the esc key as you start the notebook. Insert the Rescue DVD you've created, select Boot Options ( usually f9 ), use the arrow keys to select the CD/DVD drive and hit enter - if you get a prompt to 'Press any key to continue', do so.
If the notebook boots from the DVD, let the first screen come up ( this will show repair options etc ) then just remove the DVD and restart the notebook.