My Dell BD Drive reads bluray but won't read dvds

So I have had this external BD drive for around a year. It is Dell Inspiron 15 3520 blu-ray drive It has decided to stop reading DVDs. I have tried it on multiple computers with multiple dvds. It has no issue with blu-rays though. Any ideas? What happens when you insert a disc? Light blink? Error message? Also, what firmware version do you have on the drive. I'd say run through a couple of checks and if it doesn't appear to be software related, you may just need to get the drive replaced. Dell Inspiron 15 N5050 blu-ray drive burner So what version of Windows are you running? So I am runnIng windows 7 64-bit. This has not changed. When I put a bluray in we are good to go. When I put a DVD in the light comes on the drive spins up but after about 7 seconds Dell Inspiron 14R 5420 blu-ray drive drive stops and nothing. No error unless you click on the drive and then it reports no disc present. I was running v1.07 went to 1.06 and then back to 1.07. Dell Inspiron 1428 blu-ray drive Each time I tried the DVD and still no joy. I used the plexutilities app to test the drive, laser, etc and all was good. Very confused. These discs do work in other drives just not my plextor. Nothing. Changed to my system to my knowledge but something can always happen with windows. Dell Inspiron 1427 blu-ray drive. Can you bring up the properties for the drive under the device manager? Check to see that the DVD REGION has been set. Also, click on the driver tab and click on driver details. List the driver file entrieds that show up. DELL INSPIRON 15 N5050 BLU-RAY DRIVE BURNER WON'T READ DVDS