dvd burner wont read dvd-r

[dannyp32]

i have an hp 740b and it says it burns dvd+ or - r and cds
i have successfully burned over 25 dvd+r but now i bought a pack of dvd-r and it wont read it
on image burn it says
device not ready (medium not present)
and in my computer it doesnt read the dvd-r
the dvds are the radioshack brand called gigaware...i dont think that has anything to do with it though
i tried installing windows xp but still had the same problem so i reinstalled windows 7 rc

 

[Dwarf]

Try a different brand of disk - some drives are actually quite fussy about what they can and cannot recognise. Once you have located a brand, then stick to it. Personally, I use Verbatim on my system.

 

[Antman]

A firmware upgrade for the DVD drive may be available. It may or may not address the issue.

 

[Dwarf]

Be careful here. I've upgraded the firmware of optical drives in the past and they've turned into technological door-wedges.

 

[dannyp32]

alright i think it will just be safer to get some memorex dvd+r thats what ive used before

 

[kiralyka]

Have some problems too with my dvd writer...
it's a samsung sh-w163a:

it won't open and the LED is always on...

please help