ijoy maxo quad 315w no display or fire

[cloudbusting]

Hi veterans,i have an ijoy maxo quad 315w mod,i have updated the firmware to the latest .
It will show the display when plugged into the usb with the batteries in (it will not fire like this ) and you can see the batteries are charged and vary the wattage etc ,but with just the batteries in it will not power up or fire with no display .
Any help suggestions welcome .

 

[classwife]

Moved you to Temperature Control from Ask The Veterans...you will need to be able to participate in your thread.