Acer G520 series manual Appendix A Troubleshooting

134			Appendix A: Troubleshooting
LED Name	Function	Location	Color	Correction
POST	Display	Left rear of	Each LED	See the POST code
code 1-4	boot 80	board	can be	table
(LSB, bit1,	POST code		Off,
bit2, MSB)			Green,
			Amber,
			Red
Fan Pack	Warn on	Front center	Amber	On = Fault
Fault	fan failure	board
CPU 1 & 2	Identify fan	Front center	Amber	On = Fault
Fan Fault	failure	board
CPU 1 & 2	Identify	1” behind	Amber	On = Fault
Fan Fault	processor	processor
	failure	socket
5v	Identify 5v	Front left	Amber	On = 5v standby
Standby	standby	board		power on
	power on
	state
Power	Identify the	Control	Green	• Off = Power is
LED	power state	panel		off (off or S5)
	of the			• On = Power on

system	or S0)
	• Slow Blink =
	Low power
	state (S1 - S3)