If GS1100 can’t read any tag (SCAN LED [1 blink] -> 3 short beeps -> B/L LED [1 blink] -> B/L LED [3 blinks every 2 seconds] when you press and hold the SCAN button for 10 seconds)

It indicates that flash memory failure of GS1100 occurs. Send GS1100 to GIGA-TMS for further inspection.