If your Dvd writer not working and you want to install linux in your system then just follow some steps and make a bootable pendrive so that you easily install linux in your system.
note : only make bootable live iso file
step 1. first you install "unetbootin" in your system by using:-
"yum install unetbootin"
step 2. after installation complete you open your terminal in superuser mode and then type "unetbootin".
you will see a GUI from of unetbootin like below screenshots
if you have a iso of live image then you click on "Diskimage" and give the location of that iso file and after that you click "ok".
* after compete that process you will get two option "reboot" and "exit" if you want install it in same system then click on reboot option.
* after rebooting system you set flash drive option first in your bios setting.