What should I do if my system diagnostics are not loading properly?
Refer to the HP PC Hardware Diagnostics UEFI version 6.4.1 for troubleshooting steps and more information, available at www.hp.com/go/techcenter/PCDiags. System diagnostics include system information, system tests, component tests, and test logs. (Page 8)
From the official HP Pro Sff 400 G9 Desktop PC manual, page 8
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