Table of Contents
Advertisement
3. Look inside the server, if necessary. Certain components inside the server have
Light path diagnostics LEDs for DIMMs and fans must be viewed from inside the
server and will not be lit unless the serv.er is connected to a power source,
although the server does not have to be turned on to view these LED. The LEDs for
microprocessors and VRMs are viewed by removing the microprocessor-tray
assembly. The following sections describe the procedures to follow to view the
LEDs on the microprocessor-tray assembly and memory board.
Microprocessor LEDs
Complete the following steps to view the microprocessor LEDs:
1. Turn off the server and any peripheral devices; then, disconnect all external
2. Slide the server out of the rack cabinet.
3. Remove the fans (see "Replacing a hot-swap fan" on page 55) and memory
4. Remove the microprocessor tray:
5. Press and hold down the light-path diagnostics button on the microprocessor
LEDs that will be lit to indicate the location of a problem. For example, a VRM
error will light the LED next to the failing VRM on the microprocessor tray
assembly.
cables from the server.
cassette (see step 4 on page 46).
a. Lift the microprocessor-tray release latch (see "Installing a microprocessor"
on page 44).
b. Open the microprocessor-tray levers.
c. Pull out the microprocessor tray.
Microprocessor 3
VRM error LED
Microprocessor 3
VRM connector
Microprocessor 1
socket
Microprocessor 1
error LED
Microprocessor 2
error LED
Microprocessor 2
socket
board. The LEDs will be lit while the button is pressed. You can light the LEDs
for a maximum of 2 minutes, after which power is no longer available for the
LEDs.
Note: You can press the light-path diagnostics button to relight the light path
diagnostics LEDs that are lit on the microprocessor tray without ac
Light-path
diagnostics button
Microprocessor 4
VRM error LED
Microprocessor 4
VRM connector
Microprocessor 4
socket
Light-path
test LED
Microprocessor 4
error LED
Microprocessor 3
socket
Microprocessor 3
error LED
19
Chapter 3. Diagnostics
Advertisement
Table of Contents
