Genie Z60/34 will not steer or go in forward or reverse

I have a 2005 Genie z60/34 that will not drive. All the functions work except forward/reverse movement/wheel turning. No leaks or noises. I'm figuring something electrical but not sure what to do. Ground controls work and boom controls work. Anyone ever have this issue or know what to look for? Thanks

Genie Z60/34 will not steer or go in forward or reverse