IBM x3250 M2 Problem Determination And Service Manual page 145

USB 1 connector
System error LED
Locator LED
Power-control button
Power-on LED
2. Read the safety information that begins on page vii and "Installation guidelines"
on page 47.
3. Turn off the server and peripheral devices, and disconnect the power cord and
all external cables.
4. Remove the server from the rack and place on a flat, static-protective surface.
5. Remove the cover (see "Removing the cover" on page 50).
6. Reconnect all external cables and the power cord; then, turn on the server.
Attention: Operating the server for extended periods of time (more than 30
minutes) with the cover removed might damage server components.
Certain components inside the server have LEDs that are lit to indicate the
location of a problem. For example, a DIMM error lights the LED next to the
failing DIMM on the system board.
7. Look at the system service label on the underside of the server cover, which
gives an overview of internal components. This information can often provide
enough information to correct the error.
The following illustration shows the LEDs on the system board.
USB 2 connector
Hard disk drive activity LED
Reset button
127
Chapter 5. Diagnostics