MY OPTIARC DVD RW AD 7540 IS IN THE HARDWARE BUT I LOST IT AND IT WONT SHOW ALSO AS WELL AS IT DOES NOT WORK

1. Ensure the USB port is 2.0
2. Connect the drive directly to the USB port on the computer system. Do not connect the drive to a USB Hub
3. Try a different USB port on your system
4. Disconnect all other USB devices except a keyboard or mouse.

Also

1. You need to ensure you are using the recommended media list.
2. Make sure the drive is listed okay in Device Manager. To ensure this, right click My Computer/Properties/Hardware/Device Manager. You should have a listing here for optical drive. Double click on the optical drive and make sure there are no yellow ! marks on the drive.
3. Get the latest Firmware updates available for your drive.
4. Make sure your System/Nero ASPI files are not corrupt. Go to Nero/Nero tool kit/Nero info tool. Click on the ASPI tab. In the arrow down tab, check both your system and Nero ASPI files. At the bottom, it should display ASPI is installed and working properly. If it does not, please get the latest ASPI update. http://sony.storagesupport.com/.

Also

1. Make sure the power cable connect properly.
2. Try sticking a pin in the little hole next to the eject button on the drive. This resets the reset button for the drive to open again.

If you need more help come back.Post / thumbs / testimonial are welcome!