IBM 6150 Hardware Maintenance Manual page 217

Step 2
1. Use the "Removal and Replacement Procedures" on page 9-042-1, to
install the original module on the IBM PC Graphics Memory Expansion
Card again, but do not install the card on the IBM PC Enhanced
Graphics Adapter.
2. Install the IBM PC Enhanced Graphics Adapter in the system unit
without the IBM PC Graphics Memory Expansion Card.
3. Run the Display Checkout.
WERE YOU ABLE TO LOAD AND RUN THE REPAIR CHECKOUT
AND DID THE "NO TROUBLE WAS FOUND" MESSAGE DISPLAY?
NO The mM PC Enhanced Graphics Adapter is failing.
1. Use the "Removal and Replacement Procedures" on
page 9-042-1, to exchange the IBM PC Enhanced Graphics
Adapter. Be sure to install the IBM PC Graphics Memory
Expansion Card on the new adapter.
2. Run the Display Checkout.
YES
Continue on the next page.
3-4200-2
Service Manual