Storage Access Led And Status Led - Epson TM-T88V-DT Technical Reference Manual

Storage access LED and status LED

These display the controller unit's status.
Name
Storage access LED
Status LED (green)
Status LED (orange)
30
Status
On (Green)
On
Flashing
Off
Flashing (Approx. 1 second intervals)
Flashing (Approx. 160 millisecond
intervals)
Description
Accessing the auxiliary storage
OS is operating
OS in stand-by mode
Power is off
OS start-up sequence
 Accessing the storage device; 
Do not turn the power off. 
Doing so may result in data loss.
CPU high-temperature warning