If running off 12v car battery, check battery is charged.  If running off mains power, check power supply is plugged in.  If possible, try powering the unit using the battery if currently on mains, and vice versa.  Disconnect eye cables while the machine is powered on. If these are damaged and shorting, this can cause the unit to power off. Contact Te Pari to purchase more cables. If the machine still isn't powering on at this point, contact Te Pari for further technical assistance.