If he had a SRO fault, it wouldnt pull in the contacts or hum
hence the "off" in "static return to off"
if the switches were bad it wouldnt do anything

hes saying the only way to get it to move is to push in (by hand im assuming) the 1A and one of the FWR or REV contacts
and that regardless of which directional contactor is pushed in it will only go in reverse

im also assuming it wont drive in either direction by operating normally (sitting in seat, using the pedal and dir lever)

so... from my assumptions and the very little amount of information the original poster provided
i would think that he has some cables shorting to the frame

it also could be a short in the motor
if there is a lot of battery acid built up in the motor or frame this can cause odd issues and shorts


but since we dont know what machine this is in
we have no way to know if you have 1 drive motor or dual drive motors (i assume a single) the position of the motor etc

please post the model and serial number
or
the model number printed on the EV100 card itself (there are many different setups for different makes and models)

without that info a lot of this is just guessing