IBM 201 manual All known problems are resolved 2. The system is restarted

Table 4. Descriptions of light-path diagnostics LEDs

LED	Meaning
PS1	Power supply 1 failure
PS2	Power supply 2 failure
PS3	Power supply 3 failure
NON	Non-redundant power
OVER	The system has exceeded the power capabilities of the installed power supplies
NMI	Non-maskable-interrupt occurred
TEMP	System temperature exceeded maximum rating
FAN	A fan failed or is operating slowly
MEM	Memory failure. One or more memory DIMMs have failed
CPU	Microprocessor failure. One or both microprocessors have failed
PCI A	Error on PCI channel A or system board. Note: PCI bus A is often referred to as PCI bus 0
PCI B	Error on PCI channel B or system board. Note: PCI bus B is often referred to as PCI bus 1
PCI C	Error on PCI channel C or system board. Note: PCI bus C is often referred to as PCI bus 2
VRM	VRM Error on voltage regulator module or on integrated voltage regulator
DASD	A hot-swap disk drive, backplane, or other part of SCSI channel A has failed
SP	Integrated System Management Processor detected an error

Remind button: You can use the remind button to place the front panel system-error light into a remind mode. By pressing the button, you acknowledge the failure but indicate that you will not take immediate action. If a new error occurs, the LED will be on again.

In the remind mode, the system-error LED flashes every 2 seconds. The system-error LED remains in remind mode until one of the following situations occurs:

1. All known problems are resolved

2. The system is restarted

3. A new problem occurs

You can use the remind button to delay maintenance. Also, resetting the system-error LED enables the LED to react to another error. If the LED is still blinking from the first error, it will mask additional errors.

Chapter 7. Troubleshooting 51