Acer Altos R720 Series User Manual page 162

152
Diagnostic LED Decoder
Checkpoint
G=Green, R=Red, A=Amber
code
MSB
0x9Bh A
Fixed Media
0xB0h R
0xB1h R
0xB2h R
0xB3h R
Removable Media
0xB8h A
0xB9h A
0xBAh A
0xBCh A
Boot Device Selection
0xD0 R
0xD1 R
0xD2 R
0xD3 R
0xD4 R
0xD5 R
0xD6 R
0xD7 R
0xD8 A
0xD9 A
0XDA A
LSB
OFF G A
OFF R R
OFF R A
OFF A R
OFF A A
OFF R R
OFF R A
OFF A R
G R R
R OFF R
R OFF A
R G R
R G A
A OFF R
A OFF A
A G R
A G A
R OFF R
R OFF A
R G R
5 Troubleshooting
Description
Enabling the mouse
Resetting fixed media device
Disabling fixed media device
Detecting presence of a fixed
media device (IDE hard drive
detection, etc.)
Enabling / configuring a fixed
media device
Resetting removable media device
Disabling removable media device
Detecting presence of a removable
media device (IDE CDROM
detection, etc.)
Enabling/configuring a removable
media device
Trying boot device selection
Trying boot device selection
Trying boot device selection
Trying boot device selection
Trying boot device selection
Trying boot device selection
Trying boot device selection
Trying boot device selection
Trying boot device selection
Trying boot device selection
Trying boot device selection