As is said in the title, only 2 of the LEDs in my dry are lighting up. And the 2 that do light up are at a reduced brightness. And this was tested with fresh batteries and hooked directly up to a 12 volt power supply.
So do you guys have any idea what is wrong with it? Driver or LEDs?
Yessir. The LEDs are affixed to the head itself, making for a very good thermal pathway. If the adhesive fails, however, it won't take much to fry one.