I have an Big Blue AL1200XWP focus light that's not working properly anymore. The light still works fine at full power, so the LED is still good. But when reducing the brightness, it starts to flicker and turns off after a few seconds. The battery indicator also turns red for a couple of seconds. This looks like a problem with the electronic circuit or maybe even some bad connection. I would like to have a look at the circuit and check whetrher it's something that can still be repaired, but I don't know how to open the light head. Does anyone know how this can be done? The light is already out of warranty, and I already have a replacement, so I have nothing to loose.