DVD/CD drive not recognised, so can not play CDs

This sounds like your dvd drive stopped working. try with different cds or dvds. If not there is a complicated way but if you are not familiar with computers don't do that. A service technician can easily solve it for you.

CD ROM drive will play only 700 mb CD disks(normal CDs)...and not play DVD disks...u need DVD ROM drive to play DVDs....there is a big difference among both in it's function.
a DVD drive "may" play both DVDs and CDs....
but
a CD drive will "only" play CDs

Have you tried burning a CD in the new drive? Because the drive is a DVD it will always be recognised as a DVD, but should work perfectly well with CDs both playing and recording.

If it recognises cd but not dvd it means the drive is faulty. There is 2 lasers one for cd and one for dvd. The dvd laser is faulty. It also means that it is not dirty lens because it reads cd's.

Unless you have one of the very latest laptops, your model laptop most likely has a DVD ROM combo drive - which allows you to play DVDs and CDs also burn CDs/
You need to give me the make and model number of your laptop for me to verify if your laptop is capable of burn DVDs.

go to safemode and try reading CDs in safemode. If your burner still can't read CDs then it's most likely bad. You could get an external usb burner.

Hi

It sounds like a hardware fault on the drive itself. The laser and focussing mechanisms are different for CDs and DVDs. The fact that the drive can read DVDs fine suggests that the laser and lenses can no longer focus correctly to deal with CDs.

Replacement of the drive would be the only fix, although you might find it a lot easier to buy an external USB DVD drive.

It seems to me that ypu have not copied correctly..try to use NERO for write CD/DVD for best result...

Usually HPs are good with +R DVDs unless things have change over the last year or two.

Whats the model number on your computer?

Just check if the region code has not been locked. If you cannot play DVD's at all, first clean the lens, then install a good DVD player like cyberlink etc and then try. If the issue is related to Data DVD's as well, change the media that you are using, eg change the media type to Samsung, Sony and check. Lemme know if it works.