IBM System x3850 X6 Installation And Service Manual page 222

configuration and restart the server. If the server is unable to successfully complete
POST with the default configuration, there might be a problem with the system
board.
To specify the number of consecutive restart attempts in the Setup utility that will
trigger the Nx boot failure feature, complete the following steps. The available
values are 3, 6, 9, and 255 (disable Nx boot failure).
Procedure
1. From the Setup utility main menu, select System Settings..
2. Next select Recovery.
3. Select POST Attempts; then, select POST Attempts Limit.
4. Modify the configuration settings and select Save Settings; then, exit Setup.
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System x3850 X6 and x3950 X6 Types 3837 and 3839: Installation and Service Guide