System-Board Leds; System-Board External Connectors - IBM System x3500 Service Manual

System-board LEDs

The following illustration shows the switches and LEDs on the system board.
Microprocessor
mismatch
LED

System-board external connectors

The following illustration shows the external input/output connectors and the NMI
switch on the system board.
Keyboard
10
IBM System x3500 Type 7977: Problem Determination and Service Guide
DIMM
error LEDs
1 thru 12
Slot 1
error LED
Slot 2
error LED
Slot 3
error LED
Slot 4
error LED
Slot 5
error LED
Slot 6
error LED
Mouse
Serial 1
(COM 1)
LPT
VGA
USB 4
RJ45
USB 3
RJ45
NMI
Serial 2
(COM 2)
Microprocessor 1
error LED
Microprocessor 2
error LED
VRM error
LED
Battery error LED
BMC heartbeat
LED
ServeRAID-8k
error LED