Acer Altos R720 Series User Manual page 163

Diagnostic LED Decoder
Checkpoint
G=Green, R=Red, A=Amber
code
MSB
0xDB A
0xDC A
0xDE A
0xDF A
Pre-EFI Initialization (PEI) Core
0xE0h R
0xE2h R
0xE1h R
0xE3h R
Driver Execution Environment (DXE) Core
0xE4h R
0xE5h R
0xE6h R
DXE Drivers
0xE7h R
0xE8h A
0xE9h A
0xEAh A
0xEEh A
0xEFh A
Runtime Phase/EFI Operating System Boot
0xF4h R
0xF5h R
LSB
R G A
A OFF R
A G R
A G A
R R OFF
R A OFF
R R G
R A G
A R OFF
A R G
A A OFF
A A G
R R OFF
R R G
R A OFF
A A OFF
A A G
A R R
A R A
Description
Trying boot device selection
Trying boot device selection
Trying boot device selection
Trying boot device selection
Started dispatching early
initialization modules (PEIM)
Initial memory found, configured,
and installed correctly
Reserved for initialization module
use (PEIM)
Reserved for initialization module
use (PEIM)
Entered EFI driver execution phase
(DXE)
Started dispatching drivers
Started connecting drivers
Waiting for user input
Checking password
Entering BIOS setup
Flash update
Calling Int 19. One beep unless
silent boot is enabled.
Unrecoverable boot failure / S3
resume failure
Entering Sleep state
Exiting Sleep state
153