dwegst
I have a 8kw Generac Generator LED screen blank and will not start in manual mode or in auto mode (shut off main house panel)
LED screen is blank. 
Battery is 14.25 volts
N1 and N2 both have 120 volts and 240 across both
This started after a power surge this past week end.
Controller is a 0J8371A
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JayH
Did you check the 7.5A fuse?
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dwegst
Yes, the 7.5 is good along with the 3 buss fuses in the transfer panel
The Red off light is on but nothing on the LED screen
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grsthegreat
You can try unhooking all wires from controller and reinstall them. Total reboot controller. 
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dwegst
I did that.  I even disconnected the N1 and N2.  I did not disconnect the battery
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grsthegreat
if you unhoked all wires coming from controller than it would not matter if you unhooked the battery. i have had a few units with blank screens that i was able to restore doing this. otherwise i guess its the controller itself. did you unhook the wire connector with the long white sheathed cover also from the controller. its about 12-18 inches long
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dwegst
Yes.  I will disconnect everything again and if the LED is still blank I will order a controller.
Thank you for your help
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