IBM RT PC 10 Hardware Maintenance And Service page 111

Step 4
Look at your SRN.
3-66 Service Manual
4. Write the Service Request Number here:
1.3 -5
71< -
2 I
B -
- - -
DOES YOUR SRN HAVE A "37x" SRA?
NO Exchange the memory option, then run System Checkout.
YES Continue on the next page.