Hi guys. I bought a BLACK Retrogame300 from droixbox.co.uk and noticed when I play any game on fba a320 there was screen flickering as if there was a screen connection fault. I watched a few Utube videos and noticed the guys were using CPS2 on the same games and had no flicker. Low and behold I tried that and it was no longer there. Now this is where it gets interesting..... I bought another Retrogame300 from Amazon UK- Ambernic but was in GREY and tried using fba a320 and guess what? no screen flickering!?!!! This made me think there is actually an issue with the BLACK one so I swapped the internal AND external sd cards and still the same flickering..... only on the black one??? Now I’m guessing the firmware is on the internal sd card and not written onto the internal pcb? Also interesting is that the screen on the BLACK one is ever so slightly better (better contrast) AND the battery on the black one is 4.5V and the grey is 3.8?