I'm trouble shooting a blank display on this forklift. When key is turned on the display goes thru it test of all indicator lights then gives me a seatbelt lamp for about 12 seconds then it goes out and no other lamps are lit not even batt level indicators , pump does not turn on nothing at all. I can push the speed button it illuminates and all speeds are available by the indicator , still no pump or motor. only sounds I receive are when touching steering wheel either way a contractor makes clicking that's all I get. Manual say for a blank display to confirm voltage present between PZ7 and PZ3 and between TB4 and PZ3.
I'm sure of the pinout numbers on the card. Can anybody here help me please.

Sorry for long explanation