Acer P221W manual Troubleshooting, LED on, Led Off, EN-20

P221W

TROUBLESHOOTING

Before sending your LCD monitor for servicing, please check the trouble- shooting list below to see if you can self-diagnose the problem.

(VGA Mode)

Problems	Current Status	Remedy
	LED ON	· Using OSD, adjust brightness and contrast
		to maximum or reset to their default
		settings.
	LED OFF	· Check the power switch.
No Picture		· Check if AC power cord is properly
		connected to the monitor.
	LED displays	· Check if video signal cable is properly
	amber color	connected at the back of monitor.
		· Check if the power of computer system is
		ON.
	Unstable	· Check if the specification of graphics
	Picture	adapter and monitor is in compliance
		which may be causing the input signal
		frequency mismatch.
	Display is	· Using OSD, adjust RESOLUTION, CLOCK,
	missing, center	CLOCK-PHASE, H-POSITION and V-
Abnormal	shift, or too	POSITION with non-standard signals.
	small or too
Picture		· Using OSD, in case of missing full-screen
	large in display
		image, please select other resolution or
	size
		other vertical refresh timing.
		· Wait for a few seconds after adjusting the
		size of the image before changing or
		disconnecting the signal cable or powering
		OFF the monitor.

EN-20