If you are unable to restart the server or if you need comprehensive diagnostics,use DSA Preboot.Running DSA PrebootThis topic provides steps for how to run DSA Preboot.To run DSA Preboot, complete the following steps:1. If the server is running, turn off the server and all attached devices.2. Turn on all attached devices; then, turn on the server.3. When the prompt Diagnostics is displayed, press F2.Note: DSA Preboot might appear to be unresponsive for an unusual length oftime when you start the program. This is normal operation while the programloads.4. (Optional) Select Quit to DSA to exit from the stand-alone memory diagnosticprogram.Note: After you exit from the stand-alone memory diagnostic environment,you must restart the server to access the stand-alone memory diagnosticenvironment again.5. Select gui to display the graphical user interface, or select cmd to display theDSA interactive menu.6. Follow the instructions on the screen to select the diagnostic test to run. If thediagnostic tests do not detect any hardware errors but the problem remainsduring normal server operation, a software error might be the cause. If yoususpect a software problem, see the information that comes with your software.Recovering the server firmwareThis topic provides general information about recovering the server firmware.The flash memory in the server consists of a primary bank and a backup bank. Youmust maintain a bootable IBM UEFI firmware image in the backup bank. If theUEFI firmware in the primary bank has become corrupted, such as from a powerfailure during an update, you can recover the UEFI firmware in either of twoways:v In-band method: Through the automatic boot recovery function (automatic) orusing the boot recovery jumper and an IBM Flash UEFI Update (manual)v Out-of-band method: Using the IMM web interface and an IBM Flash UEFIUpdateYou can obtain an IBM Flash UEFI Update package from http://www.ibm.com/supportportal/or from your IBM service representative.Chapter 3. Diagnostics 73
