Problem: 1 of my computers can not find the bt4-r1.iso DVD.
Error: "No booable devices--strike F1 to retry boot, F2 for setup utility"

setup:
Laptop DELL Latitude D610 with BIOS Revision A03 and no OS installed

Have checked:
md5 is correct
dvd is 1 in bootorder in BIOS
the DVD works in another PC perfectly
reburned the ISO 2 times same result
Booted Ubuntu live cd on the laptop and it works.
Searched the web and found that with the same laptop others have run bt4 with USB and it worked, havent found anyone talking about live DVD though.


So any tips on what could be wrong ? i might have missed something as i just go up but any help is welcome.