Specifications

System shutdown
Refer to the following tables when experiencing a system shutdown that is related
to voltage or temperature problems.
Voltage related system shutdown
Message Action
System shutoff due to x current over
max value (level-critical; system drawing
too much current on voltage x bus)
See “Power checkout” on page 27..
System shutoff due to x V over voltage
(level-critical; system shutoff due to x
supply over voltage)
1. Check the power-supply connectors
2. Power supply.
System shutoff due to x V under voltage
(level-critical system shutoff due to x supply
under voltage)
1. Check the power-supply connectors.
2. Power supply.
System shutoff due to VRM x over
voltage
Replace VRM x.
System shutoff due to excessive (< 240
VA) loading
1. See “Power checkout” on page 27.
2. Cycle ac power on and off.
Temperature related system shutdown
Message Action
System shutoff due to board over
temperature
(level-critical; board is over temperature)
1. Make sure that the computer is being properly cooled; see
“System reliability considerations” on page 31.
2. Replace board.
System shutoff due to CPU x over
temperature (level-critical; CPU x is over
temperature)
1. Make sure that the computer is being properly cooled; see
“System reliability considerations” on page 31.
2. Replace microprocessor.
System shutoff due to CPU x under
temperature (level-critical; CPU x is under
temperature)
Ambient temperature must be within normal operating
specifications; see “Features and specifications — M Pro Type 6220
(desktop model)” on page 5. or “Features and specifications — M Pro
Type 6230 (tower model)” on page 6.
System shutoff due to DASD temperature
(sensor x) (level-critical; DASD area
reported temperature outside recommended
operating range)
Make sure that the computer is being properly cooled; see
“System reliability considerations” on page 31.
System shutoff due to high ambient
temperature
(level-critical; high ambient temperature)
Ambient temperature must be within normal operating
specifications; see “Features and specifications — M Pro Type 6220
(desktop model)” on page 5. or “Features and specifications — M Pro
Type 6230 (tower model)” on page 6.
System shutoff due to system board
under temperature
(level-critical; system board is under
temperature)
Ambient temperature must be within normal operating
specifications; see “Features and specifications — M Pro Type 6220
(desktop model)” on page 5. or “Features and specifications — M Pro
Type 6230 (tower model)” on page 6.
114 IBM IntelliStation M Pro Types 6220 and 6230: Hardware Maintenance Manual