HP ProLiant ML110 Generation 5 - Power-On-Self-Test

Diagnostic tools 71
To clear CMOS:
1. Perform the pre-installation procedure.
2. If necessary, remove any expansion boards, assemblies or cables that prevent access to the
CMOS clear jumper.
3. Locate the clear CMOS jumper on the system board.
4. Remove the jumper block and set it over the 2-3 pins for 20 to 30 seconds.
5. Return the jumper block to its default 1-2 position.
6. Perform the post-installation procedure.
7. During POST, press F10 to access the Setup Utility.
8. Press F9 to load the system default values.
9. Press F10 to save the changes you made and close the Setup Utility.
Power-On-Self-Test
Before you can use a server, all devices must be tested and initialized, and the operating system must
be bootstrapped to the memory. This is referred to as Power-On-Self-Test or POST. POST is a series of
diagnostic tests that checks firmware and hardware components to ensure that the server is properly
functioning. This diagnostic function automatically runs each time the server is powered on.
These diagnostics, which reside in the BIOS ROM, isolate server-related logic failures and indicate the
board or component that needs to be replaced, as indicated by the error messages. Most server
hardware failures will be accurately isolated during POST. The number of tests displayed depends on
the configuration of the server.
During POST you can press:
• Esc to skip the HP logo and go to POST boot progress display system summary screen.
• F10 to access the Setup Utility.
• F12 to request a network boot (PXE).
POST error indicators
When POST detects a system failure, it either displays a POST error message, or emits a series of
beep codes.
POST errors messages
Whenever a non-critical error occurs during POST, an error message describing the problem appears
onscreen. These text messages are displayed in normal video (white text on black background). It
shows the details of the error. The following is an example of a POST error message:
ERROR
0251: System CMOS checksum bad – Default configuration used