z8 won't boot up

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  • A friend has a formuler z8 original model not pro and started acting weird, would just completly lock up and mytvonline icon would vanish and reappear. and would randomly reboot .

    so bought it over to me

    i booted it up and android came up on screen showing error but then booted up to desktop.

    so i did a factory reset and took about 10 minutes till it finally came up with all the questions finally got to desktop but then randomly rebooted again and now just stuck on the ring that comes up on screen when booting

    tried doing reset again by unplugging and plugging back in while pressing red button repeatedly then pressing 1 when when flashing red green

    but light just flashes green with circle on screen

    no idea what firmware he was on but he did say he did a update the other day to see if that would fix it but no luck