generally if the fork light on the dash display is "on" this indicates that the seat switch circuit is open.
This could range from a bad seat switch to an open in the circuit in the seat switch circuit somewhere. And i suppose in a worse case scenario the VCM. The usual symptoms were the dash light, no hydraulic or drive functions.

I think i'd concentrate on that and verify there is no problem there first before checking anything else.

Just my thoughts on this :o)