framework-diagnostic-led-sequence.md

Framework Laptop Diagnostic LED Sequence (Intel 11th Gen Intel® Core™)

#	Blink Color	Description	enum value in EC firmware
	White	Start of diagnosis	DIAGNOSTICS_START
1	Red/Green	Battery connected check	DIAGNOSTICS_HW_NO_BATTERY
2	Red/Green	Power Good 3V5V supply	DIAGNOSTICS_HW_PGOOD_3V5V
3	Red/Green	Power Good VCCIN_AUX	DIAGNOSTICS_VCCIN_AUX_VR
4	Red/Green	CPU deassert sleep S4	DIAGNOSTICS_SLP_S4
5	Red/Green	Power boot core VR	DIAGNOSTICS_HW_PGOOD_VR
6	Red/Green	Touchpad detected	DIAGNOSTICS_TOUCHPAD
7	Red/Green	Audio board Detected	DIAGNOSTICS_AUDIO_DAUGHTERBOARD
8	Red/Green	Thermal sensor detected	DIAGNOSTICS_THERMAL_SENSOR
9	Red/Green	Fan detected and spins up	DIAGNOSTICS_NOFAN
10	Red/Green	CPU reached S0 state	DIAGNOSTICS_NO_S0
11	Red/Green	DDR initialized OK	DIAGNOSTICS_NO_DDR
12	Red/Green	Internal display initialized OK	DIAGNOSTICS_NO_EDP
	Orange	Start of POST code section	DIAGNOSTICS_HW_FINISH
	Blue/Green	POST code bit 0	DIAGNOSTICS_BIOS_BIT0
	Blue/Green	POST code bit 1	DIAGNOSTICS_BIOS_BIT1
	Blue/Green	POST code bit 2	DIAGNOSTICS_BIOS_BIT2
	Blue/Green	POST code bit 3	DIAGNOSTICS_BIOS_BIT3
	Blue/Green	POST code bit 4	DIAGNOSTICS_BIOS_BIT4
	Blue/Green	POST code bit 5	DIAGNOSTICS_BIOS_BIT5
	Blue/Green	POST code bit 6	DIAGNOSTICS_BIOS_BIT6
	Blue/Green	POST code bit 7	DIAGNOSTICS_BIOS_BIT7

Deciphering the colors

Red/Green Hardware Checks Section

Color	Status
Green	Pass
Red	Fail

The Embedded Controller is responsible for performing and reporting the state of these hardware checks.

Blue/Green Power-on Self-test (POST) Code Section

Color	Binary Value
Blue	1
Green	0

These values represent the eight bits of the byte that is the last known state of the BIOS POST debug code on x86 I/O port address 0x80. It's suspected that these bytes represent stages in the boot process specific to the InsydeH2O BIOS.