Biostar B550T-SILVER Instruction Manual page 21

Debug LED: Debug LED Indicators
This LEDs indicate the status of the motherboard.
Note
» After starting the computer, the LED indicators will light up in the following order:
DRAM → CPU → VGA → BOOT
» When the computer is ready, the LED indicator will show where the error occurred and will stay on
until the problem is solved.
» After the computer is started, the Debug LED will not light up if there is no abnormality detected
CPU - indicates CPU is not detected or fail.
DRAM - indicates DRAM is not detected or fail.
VGA - indicates GPU is not detected or fail.
BOOT - indicates booting device is not detected
or fail.
Chapter 2: Hardware installation | 21
B550T-SILVER