Checked all sensors and switches and everything is functional. Drive and Reverse Functions No Issues. Pressure Test Hydraulic Pump for boom, bucket, and auxiliary which is separate from drive pump and has sufficient pressure (3000 psi +/-). Bucket will curl out but minimal. Boom totally locked out but manual hand controls are unlocked. Problem started intermittently (2 or 3 times had the issue but months in between and restarting machine solved it.) Now totally locked out. Seems like it may be a solenoid or some type of safety lockout. Does anyone know of any common fix for this issue or have access to a schematic so we can test solenoids. Any help greatly appreciated.
Check your port lock solenoid. Make sure it has good voltage and ground. Check the resistance. If all that is good the valve inside the solenoid may be stuck.