AskManual.ai
!!
critical HP

Error Code LED blinks red four times, once every second, followed by a two-second pause, computer beeps four times

Processor thermal protection activated; possibly due to blocked fan or improperly affixed heat sink.

? What Causes This

Fan blockage, improper installation of cooling components.

✓ How to Fix It

  1. Ensure the computer air vents are clear and fans (especially processor) are running.
  2. If necessary, open access panel, press power button to check fan operation; replace fan if not spinning despite proper cable connections.

Source: page 81 of the official manual

From the manual

Manual page 81 — HP error LED blinks red four times, once every second, followed by a two-second pause, computer beeps four times

This error code appears in:

HP Prodesk 600 G3 Small Form Factor PC