Lenovo ThinkCentre M91p Hardware Maintenance Manual - Page 69

Diagnostic Error Code 305-000-XXX Monitor DDC Test Passed 305-250-XXX Monitor DDC self test failure 415-000-XXXModem Test Passed 415-XXX-XXX Modem error FRU/Action No action 1. Run the Setup Utility program to enable DDC 2. Cable 3. Monitor 4. Video card 5. System board No action Remove the Modem and re-test the system Beep symptoms Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST. The following tables describes beep symptoms. Beep Symptom 2 short 1 long beeps 4, 5, 6, or 7 beeps9, 10, or 11 beeps 8 beeps FRU/Action Reseat the memory modules. If the error persists, replace the memory modules one at a time until the failing module is determined. Before replacing the system board, remove any optional adapters (Express card, Modem card, Media reader) and retry. If the problem persists, replace the system board. Otherwise, reinstall the optional adapters one at a time until the failing adapter is determined. Replace the system board. POST error codes Each time you turn on your computer, it performs a series of tests to check the operation of the computer components and some optional devices in the computer. This series of tests is called the power-on self-test, or POST. The POST does the following operations: • Checks some basic system board operations • Checks the memory operation • Starts the video operation • Verifies that the boot drive is working If the POST detects a problem, an error message is displayed on the screen. A single problem can cause several error messages. When you correct the cause of the first error message, the other error messages probably will not be displayed the next time you turn on the computer. Chapter 7. Symptom-to-FRU index 63