Z Gemma star h2 keeps flashing at when switching box on from mains


Hi , my Zgemma star h2 keeps and showing as "flash" when i switch it from the mains. This is with the USb I flashed it with in the box at the back. When I don't use the USB it loads normally but I lose my epg. Any idea why this is and how to fix it? Btw I'm using iPab.tv image