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User Manual - Page 24

For 20CAV37K-B.

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24
ENG
English
Troubleshooting
TROUBLESHOOTING
Vertical Frequency:
Inordertodisplayanimage,thescreenmustberefresheddozensoftimesper
secondlikeafluorescentlamp.Thenumberoftimesthescreenisrefreshedpersecondiscalled
verticalfrequencyorrefreshrateandisrepresentedbyHz.
Horizontal Frequency:
Thetimeittakestodisplayonehorizontallineiscalledthehorizontalcycle.
Thenumberofhorizontallinesdisplayedinonesecond
canbecalculatedbydividingonebythehorizontalcycle.Thisiscalledhorizontalfrequencyandis
representedbykHz.
NOTE
Check the following before calling for service.
No image appears
Isthepowercordofthedisplay
connected?
Checkandseeifthepowercordisconnectedproperlytothepower
outlet.
Isthepowerindicatorlighton?
PressthePowerbutton.
Isthepoweronandthepower
indicatorWhite?
Adjustthebrightnessandthecontrast.
Isthepowerindicatorflickering?
Ifthedisplayisinpowersavingmode,trymovingthemouseor
pressinganykeyonthekeyboardtobringupthescreen.
TrytoturnonthePC.
Doyouseean"OUTOFRANGE"
messageonthescreen?
ThismessageappearswhenthesignalfromthePC(videocard)is
outofhorizontalorverticalfrequencyrangeofthedisplay.Seethe
'Specifications'sectionofthismanualandconfigureyourdisplay
again.
IstheNoSignalmessagebeing
displayed?
Afterthemonitorison"NOSIGNAL",themonitorgoestoDPMmode.
ThisisdisplayedwhenthesignalcablebetweenthePCandthe
monitorismissingordisconnected.Checkthecableandreconnectit.
Do you see a "OSD LOCKED" message on the screen?
Doyousee“OSDLOCKED”when
youpushMENUbutton?
Youcansecurethecurrentcontrolsettings,sothattheycannotbe
inadvertentlychanged.YoucanunlocktheOSDcontrolsatanytime
bypushingtheMENUbuttonforseveralseconds:themessage“OSD
UNLOCKED”willappear.
Display image is incorrect
DisplayPositionisincorrect.
Pressthe
AUTO
buttontoautomaticallyadjustyourdisplayimageto
theidealsetting.
Onthescreenbackground,vertical
barsorstripesarevisible.
Pressthe
AUTO
buttontoautomaticallyadjustyourdisplayimageto
theidealsetting.
Anyhorizontalnoiseappearingin
anyimageorcharactersarenot
clearlyportrayed.
Pressthe
AUTO
buttontoautomaticallyadjustyourdisplayimageto
theidealsetting.
Check
Control Panel ► Display ► Settings
andadjustthedisplay
totherecommendedresolutionoradjustthedisplayimagetotheideal
setting.Setthecolorsettinghigherthan24bits(truecolor).
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