Need help fixing my TR-801

I have been using my a Trust Fire TR-801 LED Flashlight mounted to my handlebar for riding my bike at night. After a few rides the light started switching modes whenever I hit a big bump. So, I decided to try to mount it to my helmet and as I was fitting the helmet mount I accidentally dropped the TR-801 from waist height and it hit a concrete floor and stopped working. When I cycle the switch on and off I can see the emitter just barely light up but extremely dim. I tried freshly charged cells and I still get a very faint amount of light from the emitter. The brightness doesn't change when I attempt to cycle through the modes.

Can anyone give me some help in fixing this? Is it likely a problem with the emitter or the board?