Lenovo ThinkStation P920, Hardware Maintenance Manual, Page: 105 / 246

Error FRU/Action
The start-up drive is not in the boot sequence in
configuration. Check the configuration and ensure that the start-up drive
is in the boot sequence.
No operating system installed on the boot drive. Install an operating system on the boot drive.
The boot sector on the startup drive is corrupted. The drive must be formatted. Do the following:
1. Attempt to back up the data on the failing hard disk
drive.
2. Using the operating system programs, format the
hard disk drive.
The drive is defective. Replace the hard disk drive.
Power supply problems
If you suspect a power problem, use the following procedures.
Check/Verify
FRU/Action
Check the following for proper installation.
• Power cord
• On/Off switch connector
• On/Off switch power supply connector
• System board power supply connectors
• Microprocessor connection
Reseat connectors
Check the power cord for continuity. Power cord
Check the power-on switch for continuity.
Power-on switch
Beep symptoms
Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST.
The following table describes the beep symptoms.
Beep symptom
FRU/Action
2 short beeps: common POST error Common POST error code. See the detailed failure
information in “POST error codes” on page 98.
3 short and 1 long beeps: DRAM memory error Perform the following actions in order:
1. Make sure that the memory modules are properly
seated in the memory slots.
2. Replace the memory modules.
3. Replace the system board (for trained service
personnel only).
Chapter 8
.
Service checkout and symptom-to-FRU index
97