!!
critical HP
Error Code LED blinks rapidly amber
Indicates battery has reached dangerously low level or is not charging, possibly due to cable disconnection.
? What Causes This
Battery issues like insufficient charge or failed connection.
✓ How to Fix It
Charge the device immediately and inspect connections. If problems persist, contact support.
Source: page 20 of the official manual
From the manual
This error code appears in:
HP Elitebook 850 G3 Notebook PC