IBM pSeries 630 6C4 Service Manual page 135

Step 1522-7
Replace the items in the following list one at a time. Turn the power off before removing the item, and turn
the power back on after replacing the item to determine if the drawer will power on.
1. Replace the power supply with the green DC good LED off.
2. Replace the other power supply with the one just removed from above.
3. Replace the I/O drawer backplane.
Does the I/O drawer power on?
NO Have all the items in the list above been replaced?
NO Go to beginning of this step and replace the next item.
YES Call service support.
The item just replaced was defective. This ends the procedure. Go to "MAP 0410: Repair
YES
Checkout" in the RS/6000 Eserver pSeries Diagnostic Information for Multiple Bus Systems.
Step 1522-8
Is this machine connected to dc power?
NO Go to "Step 1522-12" on page 116.
YES Go to "Step 1522-9".
Step 1522-9
Are all circuit breakers reset at the rack power distribution panel?
NO Reset the breaker switch by first turning off, then turning on.
This ends the procedure. Go to "MAP 0410: Repair Checkout" in the RS/6000 Eserver pSeries
Diagnostic Information for Multiple Bus Systems.
YES Go to "Step 1522-10".
Step 1522-10
Are all the dc power cables seated firmly and connected correctly from the rack power distribution
panel to the rack drawers?
NO Fix the connection.
This ends the procedure. Go to "MAP 0410: Repair Checkout" in the RS/6000 Eserver pSeries
Diagnostic Information for Multiple Bus Systems.
YES Go to "Step 1522-11" on page 116.
Chapter 3. Maintenance Analysis Procedures (MAPs)
115