Instructions for model 55x5/5x and OpenPower 720

1. Is the reference code 1xxx 2630?
   • No: Continue with the next step.
   • Yes: The voltage regulator for 1.3V for processor card 1 is the failing item and needs to be replaced (see Locations -- 550, 55A, or OpenPower^(TM) 720 to locate and replace the regulator).This ends the procedure.
2. Is the reference code 1xxx 2631?
   • No: Continue with the next step.
   • Yes: The voltage regulator for 1.5V on system processor card 1 is the failing item and needs to be replaced (see Locations -- 550, 55A, or OpenPower 720 to locate and replace the regulator). If the regulator is not pluggable or it the problem is not resolved after you replace this part, exchange system processor card 1. This ends the procedure.
3. Is the reference code 1xxx 2632?
   • No: Continue with the next step.
   • Yes: The voltage regulator for 2.5V on system processor card 1 is the failing item and needs to be replaced (see Locations -- 550, 55A, or OpenPower 720 to locate and replace the regulator). If this regulator is not pluggable or if the problem is not resolved after you replace this part, exchange the system processor card. This ends the procedure.
4. Is the reference code 1xxx 2640?
   • No: Continue with the next step.
   • Yes: The voltage regulator for 1.3V for processor card 2 is the failing item and needs to be replaced (see Locations -- 550, 55A, or OpenPower 720 to locate and replace the regulator). If the problem is not resolved after you replace this part, exchange the following parts, one at a time:
     • service processor
     • system processor assembly P2
     This ends the procedure.
5. Is the reference code 1xxx 2641?
   • No: Continue with the next step.
   • Yes: The voltage regulator for 1.5V on system processor card 2 is the failing item and needs to be replaced (see Locations -- 550, 55A, or OpenPower 720 to locate and replace the regulator). If this regulator is not pluggable or if the problem is not resolved after you replace this part, exchange system processor card 2. This ends the procedure.
6. Is the reference code 1xxx 2642?
   • No: Return to the Starting a Service Call. This ends the procedure.
   • Yes: The voltage regulator for 2.5V on system processor card 2 is the failing item and needs to be replaced (see Locations -- 550, 55A, or OpenPower 720 to locate and replace the regulator). If this regulator is not pluggable or if the problem is not resolved after you replace this part, exchange the system processor card. This ends the procedure.