Hyundai Elevators hall call problems

Good'ay people
I am taking care of 2 Hyundai elevators with a group (SBC 88/2), I am having a problem where the input modules(red) are not lighting up, but the output modules(white) are lighting up when pressing the buttonbut the call is not latching also the WDC board has an led that flashes sometines.

Thanks heaps

Stealth
Cuban
Missile

have u solved this problem already? what model of controller is this?

call Hyundai they mey help. btw have a Korean present