What steps should I take before contacting technical support for my HP EliteDesk?
First, troubleshoot using the HP diagnostic tool and check if error codes are displayed on front panel LEDs; attempt to reinstall or remove recently installed software/hardware. Finally, revert system settings through a recovery method like restoring from an SSD (Page 45).
From the official HP Elitedesk 800 G5 Desktop Mini PC manual, page 45
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