Introduction
This document discribes how to diagnose a problem with the indicator light on Cisco Unity Connection Media Convergence Server (MCS) 7835 I series.
Problem
On MCS 7835 I series, a yellow indicator light is turned on as shown in this image:
![](/c/dam/en/us/support/docs/unified-communications/7800-series-media-convergence-servers/117619-probsol-mcslight-00-00.png)
You can see an indicator light turned on when you pull out the panel. In this case, the light is turned on because the system event log is full.
Note: IBM has confirmed that the light is turned on when the system event log is full.
![](/c/dam/en/us/support/docs/unified-communications/7800-series-media-convergence-servers/117619-probsol-mcslight-00-01.png)
Solution
As mentioned earlier, an indicator light is turned on because the system event logs are full. Complete these steps in order to clear the system event logs:
- During the boot process, press F1 when this screen appears to enter BIOS:
![](/c/dam/en/us/support/docs/unified-communications/7800-series-media-convergence-servers/117619-probsol-mcslight-00-02.png)
- Once you press F1, choose System Event Logs:
![](/c/dam/en/us/support/docs/unified-communications/7800-series-media-convergence-servers/117619-probsol-mcslight-00-03.png)
- Choose the Clear System Event Log option in order to clear the system event log from this screen:
![](/c/dam/en/us/support/docs/unified-communications/7800-series-media-convergence-servers/117619-probsol-mcslight-00-04.png)
- Press Enter when it prompts you to confirm the delete request:
![](/c/dam/en/us/support/docs/unified-communications/7800-series-media-convergence-servers/117619-probsol-mcslight-00-05.png)
- Press Esc in order to go back to the main BIOS screen.
- Press Esc again to exit the BIOS. The system continues its boot process.