how to hard reset my onda tablet

A

AC Question

How to hard reset a onda tablet? I tried to overclock my onda tablet but infortunately now it doesn t work anymore. When i press the botton power i can see the logo of android but nothing more.
I tried to do a soft reset with a toothstick but nothing happens: the tablet reboots but i am always in the same situation.
I read how to do an hard rest (press back home and power together) but unfortunately this buttons (back and home) have never worked even when the tablet was still alive.
If someone knows what i can do i would be really happy.