I'm in the fog with this system Android, I installed a graphics processor on the tablet app Evolio X7 and goodbye . It refused to start or enter into recovery mode , remaining stuck in boot image . I downloaded several roms that are basically the same hardware configuration ( CPU RK3188T , Mali400MP , but for other brands of tablets ) I wrote RKBatchTool but after 100 % and OK the confirmation message does not start , the display remains black. Android experts can explain to me how I get through because I stock ROM . Thank you!