P4 connection issue?

[Danielpyz]

Hi,
I just rebuilt my crashed p4 and i haven finish working on the gimbal camera unit

but i tried to power on the p4 and it shows aircraft disconnected on the dji go 4 app..

Please help me see if there is any issue.. how do i knw if the replaced motors r working etc..

when i power it up..there is the normal dji p4 chime.. two lights were red and another two was blinking red, green, yellow before turning to solid red...

Please advice..

 

[Danielpyz]

 

[BillFix]

I have the exact same problem, the motors won't run, the screens read the same.I tried calibrating the gimbal, the right front sensor screen (on my laptop) reads the calibration pattern sometimes but the left screen is always snowy. could a damaged Gimbal ribbon cable cause this and the motors not running? The gimbal does the test exercises at start up. Cable on order. Could this be causing all my problems?