Hi ! I bought a GP32 sold as BLU. I just received it and I believe it is a FLU (it has a little switch in the back that looks like a hack job and the unlit screen is somewhat usable outdoors). The GP32 works but the screen won't light itself when I toggle the little switch. The frond LED is plain red. I'm using batteries to power it up. Any advice ? Is this indeed a FLU ? Is the front light probably dead ? Or could it be worth it to open it up and check the switch ?