Nice work there. Pretty standard charge, in fact that's pretty competitive with Best Buy Geek Squad. I was expecting it to be more.
There are a few Optical Drives that have a reset button (like a router or cable modem) on the bottom or rear of the drive itself, but not many. He probably meant physically removing the DVD drive from the laptop drive bay (remember I said it's usually 1-2 screws?), and then re-inserting the DVD drive back into the drive bay. PRIOR TO DOING THIS HOWEVER, ENSURE THAT YOU REMOVE BOTH YOUR AC ADAPTER AND THE LAPTOP BATTERY FROM THE LAPTOP!!! THIS IS VERY IMPORTANT!!!
It's probably worth a try.
Be warned that if your Dell is one of the new laptops that has the laptop battery buried inside the bottom case, you'll have to completely remove all those screws to get to the compartment inside the laptop where the battery lives. This could be anywhere from 10-16 screws that would need to be removed if you do it yourself. You will need a jeweler's screwdriver with a Philips-head to do so. If you don't have one of these, you can buy jeweler's screwdriver kits at Radio Shack or Home Depot for $10-$20 US. They are readily available. Opening up the laptop case violates your factory warranty from Dell, but, since you've already talked to Dell, and your laptop is out of warranty, that doesn't matter.
The process of doing this will send a power-reset signal from the Laptop Main CPU to the DVD drive. The laptop BIOS will see the DVD drive or not after this reset. If the BIOS still fails to see the DVD drive, as I said in my earlier posts, it's probably faulty. If the DVD drive fails to respond to the power reset signal coming from the BIOS, it probably will fail to be recognized by Windows and therefore any Windows diagnostics such as Device Manager in the Control Panel. If the DVD drive power reset works, and the BIOS recognizes the DVD drive, but Win10 still does not. The drive could still be faulty and must be replaced. The only way to know for sure is to replace the internal DVD drive with an exact replacement or buy the $20 external usb DVD writer I recommended earlier and test. Plugging in the external usb DVD drive is still the cheapest way to troubleshoot exactly where your problem lies.
Since Mike's Registry fix works on other people's DVD drive problems, it's very likely your DVD is faulty; either intermittently so, or it's completely bad.
Hope that helps!
<<<BBJ>>>