CD/DVD not detected by DVD ROM

My CD-ROM is not detecting any DVD or CD. The external light blinks thrice as soon as I put a CD inside, and then no light at all. Referring to a similar post I tried
         sudo lshw -C disk; sudo lshw -C drive; lsb_release -a

this was the output
          *-cdrom
       description: DVD-RAM writer
       product: DVDRAM GH22NS50
       vendor: HL-DT-ST
       physical id: 0
       bus info: scsi@0:0.0.0
       logical name: /dev/cdrom
       logical name: /dev/cdrw
       logical name: /dev/dvd
       logical name: /dev/dvdrw
       logical name: /dev/sr0
       version: TN02
       capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
       configuration: ansiversion=5 status=nodisc
for my DVD ROM. Please help