Bobcat 773 Boom Bucket won't Move

Been using the Bobcat 773 on a rotary mower, so the auxiliary hydraulics have been on full time mowing.

Now without the mower, with just a bucket, the boom will only go up and the bucket will only go down unless the auxiliary hydraulics light is on and the thumb switch is pushed "in". Without the light on the engine is laboring.

I'm assuming it had a stuck solenoid valve but I don't know which one. Is that the problem or is there another problem? All the lights are on on the BCIS, and...

Bobcat 773 Boom Bucket won't Move

Bobcat 773 Boom Bucket won't Move