Operation Manual

Note: See Chapter 7, “Parts listing, Types 8861, 8862,” on page 139 to determine which components are
replaceable by the customer and which components must be replaced by an IBM field service technician.
Service Processor message FRU/action
System is over recommended voltage for
1.8V CPU
1. Check light path and replace failing component.
2. VRM3or4.
3. Microprocessor x.
System is over recommended voltage on
VRM X
1. VRM3or4
2. Microprocessor tray assembly
System is under recommended voltage for
1.8V CPU
1. Check light path and replace failing component.
2. VRM3or4.
3. Microprocessor x.
System is under recommended voltage on
VRM X
1. VRM3or4
2. Microprocessor tray assembly
System log 75%% full
v Information only
System Memory Error
1. Reseat memory card and DIMMs.
2. Replace memory.
System over recommended ambient
temperature
1. Check all fans and remove any obstacles from the path of
airflow.
2. Verify room temperature is within recommended range.
System over recommended voltage for +12v
1. Power supply
2. Power backplane
System over recommended voltage for +5v
1. Power supply
2. Power backplane
3. I/O board assembly
System over recommended voltage on +2.5v
v Microprocessor tray assembly
System over recommended voltage on +3.3v
v I/O board assembly
System over temperature for CPU X
1. Check all fans and remove any obstacles from the path of
airflow.
2. Verify room temperature is within recommended range.
3. Verify the microprocessor heat sinks are properly seated.
System Power Good Fault
v Reseat/replace VRMs 3 and 4.
System Running Nonredundant Power
1. Insert another power supply (if possible) and verify ac
cord connections.
2. Remove devices consuming extraordinary power from the
system.
3. Replace power backplane.
System shutoff due to +1.5v over voltage
1. Check light path and replace failing component.
2. VRM3or4.
3. Microprocessor x.
4. Microprocessor tray assembly.
114 IBM xSeries 365 Types 8861, 8862: Hardware Maintenance Manual and Troubleshooting Guide