I have an 853 and the bucket or boom won’t work.

[JohnII]

I checked the wires at the solenoid and have no power. The parking break dose release, & the hydraulic system is being pressurized when I push the pedals.

 

[Tazza]

I'm assuming it's a BICS machine, so trace back from the coil to the bics box to ensure the wires are good. Are all the lights on when looking at the BICS box?
As it is releasing the brake, it does sound like your seat and seat bar sensors are working as they should....