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critical HP

Error Code Red LED 5 blinks every second followed by a 2 second pause

Pre-video memory error occurred. Indicates an issue within the pre-video processing phase.

? What Causes This

Memory errors or issues with video card drivers/system BIOS prior to POST operations.

✓ How to Fix It

  1. Check and reseat your graphics card.
  2. Reboot and enter Setup (F10) where you can run a diagnostic test for the memory.
  3. Replace hardware that may be faulty if further diagnostics fail.

Source: page 4 of the official manual

From the manual

Manual page 4 — HP error Red LED 5 blinks every second followed by a 2 second pause

This error code appears in:

HP Elitedesk 800 G1 Small Form Factor PC