Intermittent problems

Use this information to solve intermittent problems.

The intermittent problems and actions table with one level of row and column headers

  • Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved.
  • If an action step is preceded by (Trained technician only), that step must be performed only by a trained technician.
  • Go to the Lenovo support website at the Lenovo Support Portal to check for technical information, hints, tips, and new device drivers or to submit a request for information.
Symptom Action
A problem occurs only occasionally and is difficult to diagnose.
  1. Make sure that:
    • All cables and cords are connected securely to the rear of the server and attached devices.
    • When the server is turned on, air is flowing from the fan grille. If there is no airflow, the fan is not working. This can cause the server to overheat and shut down.
  2. Check the system-error log or IMM event logs (see Event logs).
The server resets (restarts) occasionally.
  1. If the reset occurs during POST and the POST watchdog timer is enabled (click System Settings > Recovery > System Recovery > POST Watchdog Timer in the Setup utility to see the POST watchdog setting), make sure that sufficient time is allowed in the watchdog timeout value (POST Watchdog Timer). If the server continues to reset during POST, see UEFI (POST) error codes and Lenovo Dynamic System Analysis.
  2. If neither condition applies, check the system-error log or IMM system-event log (see Event logs).
Parent topic: Troubleshooting by symptom