Dvd rom not reading dvd while reading cd properly!!!

Try the DVD disk in some other computer, to ensure that the disk itself is OK.
Try some other "known-good" DVD-disk in your Toshiba SD M1502 drive.

Or, spend $40 and purchase a brand-new, CD/DVD reader/writer, to replace the faulty device.

Sorry, but this device does not burn DVDs. It just reads them.

It is a DVD ROM drive which stands for DVD Read Only Memory. In other words, this drive is meant to only PLAY DVDs and CDs but NOT save data to them.

To burn CDs you need a CD burner. Burners are of 3 types:

CD writer only burns and reads CDs.

Combo drive reads CDs and DVDs but only burns CDs.

Super drive burns and reads from CDs and DVDs.

As you go higher in functionality, the price also increases. Check your needs before you plan to buy one. Also compare prices of all the drives. Note: burn-able media costs are separate.

Try re-installing your the driver for your dvd rom. Then try to put different dvds and check if it can read from your drive. If problem remains, I suspected it's your dvd rom is faulty

Impossible, since your device _reads_ CDs/DVDs, but does not _write_ either CD nor DVD.

Do you have a USB memory-stick (holding 4Gbytes) ?
If so, copy the files to the memory-stick,
and take the memory-stick to your friend's computer,
presuming that his/her computer has a DVD-writer.
That DVD can be _read_ on your computer.

Out of alignment/dirty...accordianman

in your case ,this may be due to two reasons...
1)your reading lens may be having some defects like only responding to dvd`s and not cd`s
2)the cd`s that u used may have been written using digital burning security.......
try the same drive in your freinds computer also and check it out

please stop smoking near your harware

Your CD "Burn" laser or "Quadrant Detector" has "Faulted" a very common occurrence for these "Combo" drives,...So..I'm sorry but ya gonna haveta get another... as these ya can't fix. :(