JVC GM-H40L1G Pixel defects, Page, menu, Symptom, quickly, one side, Color is poor or unstable, The picture becomes blurred, “PLEASE ENTER PASS ID” appears

Symptom	Probable cause and corrective action	Page
Power is suddenly turned on or off.	The power-on/off timer is activated. Deactivate the timer.	27
	• For RGB input, adjust “DOT CLOCK” and “CLOCK PHASE” on the	19
	main menu.
The picture becomes blurred.		•
	• If the connection cable used for RGB terminal is long, set “SYNC
		27
	TERM.” to “LOW.”
	• Adjust the picture quality on “PICTURE SETTING” of the main	19
	menu.
Color is abnormally bright or dark.		•
	• If “TEMP. OVER” is displayed, follow the procedure described on
		36
	page 36.
Color is poor or unstable.	Select the correct color system.	23
The picture is cut or shifted toward	• Input signals (scanning frequency, etc.) are not appropriate.	11
		•
one side.	• Adjust the size and position properly.
		19
	When “INPUT B” of “INPUT CONFIGURATION” is set to
Menu does not appear or disappears	“COMPONENT” with a personal computer connected to the	21
quickly.	RGB/COMPO. terminal, the menu operation is not available. Select
	another input to operate the menu.
Some items are not shown on the	Items not available for the current input signal are not displayed.
	Change the input or signal format. Some items are displayed only	—
menu.
	when the corresponding optional input card is inserted.
“PLEASE ENTER PASS ID” appears	The Power-on Lock is activated. Enter the password to turn on the	25, 30
when trying to turn on the monitor.	monitor, and then deactivate the Power-on Lock.
Buttons on the main unit do not work.	The Control Lock is activated. Deactivate it.	27

Pixel defects

LCDs use collections of fine points (“pixels”) to display images. While there is no problem with more than 99.99% of these pixels, please understand that a very small number of pixels may not light, or may light all the time.

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