i have an old droid a855 and it comes on and i can see light behind the screen but the screen doesn't work. Is there anyway i can reset it to get it to work?
Not that I can think of. This is what I was gonna post if it worked. But you may benefit from it: Using RSD Lite to flash an SBF file -- correctly
Problem is, if you can't get the phone into the boot loader, rsd lite won't recognize your phone. Unless it's the screen that's out. If so, you may be able to find a cell phone repair shop in your area that can replace it.
Mine just did this yesterday. Open slider keyboard, press X and hold while powering up. Continue to hold X. It took several seconds, probably 5-8 but mine came up in recovery, then I started over with SS5.6.
Hope it works for you.
rooted...Trusting ChevyNo1...SS5.6 (11/23/2012)
This should keep me busy for a while
Thunderbolt --> rooted with Thunderbolt Tool 1.0