critical HP

Error Code Red LED 11 blinks every second followed by a 2 second pause

The currently installed processor does not support certain features previously enabled.

? What Causes This

Configuration mismatch between current CPU and available system settings for disabled or restricted functionalities due to architectural compatibility issues.

✓ How to Fix It

Update the BIOS/UEFI using an approved vendor's firmware update package accessible via OS.
Ensure CPU supports intended functions by reviewing specs documentation before enabling same from within the BIOS menu options.
If in doubt about processor capabilities consult official specifications or seek support for a professional review.

Source: page 4 of the official manual

From the manual

Manual page 4 — HP error Red LED 11 blinks every second followed by a 2 second pause

This error code appears in:

HP Elitedesk 800 G1 Small Form Factor PC