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critical HP
Error Code LED blinks 3 times (failure code)
A fault indication showing system issues detected by HP PC Hardware Diagnostics UEFI when computer does not start in Windows.
? What Causes This
Failure in hardware components while booting into the operating system environment.
✓ How to Fix It
Initiate diagnostics through recovery settings in BIOS and follow on-screen instructions to resolve failures.
Source: page 87 of the official manual
From the manual
This error code appears in:
HP Elitebook 850 G6 Notebook PC