While you are waiting for a new comp, recover the 404a. Recharge 2 oz of 134A, then follow up with 404a. Do a static charge of the 404a to about 60 or 70 psi. Remove the TXV bulb from the sution line and let it set in the air. Adjust the TX closed. Put a thermocouple inbetween the TX and the evap (TC1). Install another on the suction line 2 inches from the evap (TC2). Start the system. Adjust the charge of 404A.

What you are looking for is
Head pressure of about 125-175 psi.
Suction pressure of 5-10 inches of vacuum
TC 1 temp of -35 to -45c
TC 2 temp within 1-2 degrees c of TC1
Watch and make sure that teh frost line stays about 4-6 inches away from the comp.

If the head pressure is above 175 PSI and the suction is more than 10 inches of vacuum, then open the TX. If the head pressure is less than 150 PSI and the suction is more than 10 inches, adjust the charge of 404A.