Motorola Droid :: Unrooting Without Power Button

Im sending in my droid to verizon since my power button was not working and they sent me a replacement. Before I sent it in I wanted to remove root so I went into rom manager and chose a stock image to flash hoping it would do the job. Unfortunately, after I did it Superuser permission is still there. I would just use RSD Lite but since I cant get my phone to access the boot loader screen I cant get RSD Lite to recognize my phone. I was going to try to flash the older stock image from rom manager thinking maybe that would work but now when I try and flash any rom through rom manager I get this message; "an error occurred while attempting to run privileged commands". I also read that maybe quick boot would do the trick but it just force closes every time, making me think that maybe the phone isnt rooted but just has superuser permission listed(is that possible)? Is my phone still rooted?