Recently received the RG350M to replace my almost new RG350 which I liked but the button layout was a let down, the RG350M looked promising but having turned it on and loaded up a game I heard a slight popping noise within the speakers, I thought maybe this is a one off and I'll try a few more games from different emulators and the same thing happens across all emulators, now the screen has a slight but annoying buzzing noise, i've asked a few on youtube if they have encountered this problem, some say yes and some say no, have I gotten myself a faulty unit?? I cant even reflash the stock sd card as it has a sticker covering the slot, any help would be great, cheers.