IBM 7026-H80 - RS/6000 - 256 MB RAM Service Manual page 136

Step 1540-6
1. Turn off the power.
2. Disconnect the ac power cable from the CEC drawer.
3. Replace the items in the following list, ONE at a time.
a. Memory DIMMs quad A on memory riser card 1, if present, with new or
b. Memory riser card (Location: U1.1-P1-M1), if present, with a new or previously
c. Memory riser card (Location: U1.1-P1-M2), if present, with a new or previously
d. Memory DIMMs pair A on one-way processor card, if present, with new or
e. Processor card (Location: U1.1-P1-C1)
f. CEC drawer backplane (Location: U1.1-P1)
4. Reconnect the ac power to the CEC drawer.
5. Turn on the power to boot standalone diagnostics from CD.
Is the Please define the System Console screen displayed?
NO
YES
Step 1540-7
Have all the parts, if present, listed in "Step 1540-6" been replaced?
NO
YES
118
Service Guide
previously removed DIMMs
removed memory riser card
removed memory riser card
previously removed DIMMs
Go to "Step 1540-7".
The last item replaced was defective. Return the machine to the original
configuration. Go to "MAP 410: Repair Checkout" in the Diagnostics
Information for Multiple Bus Systems .
Go to "Step 1540-6".
Go to "Step 1540-11" on page 121.