LG Electronics 25UB55 Computer Monitor User Manual


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ENG
ENGLISH
TROUBLESHOOTING
TROUBLESHOOTING
Nothing is displayed on the screen.
Isthemonitor'spowercordplugged
in?
Checkifthepowercordiscorrectlypluggedintothepoweroutlet.
Isthepowerindicatoron?
Checkthepowercableconnectionandpressthepowerbutton.
Isthepowerindicatordisplaying?
Checkthattheconnectedinputisenabled(Menu-Input).
Isthepowerindicatorblinking?
Ifthemonitorisinpower-savingmode,movethemouseorpressany
keyonthekeyboardtoswitchthedisplayon.
Checkifthecomputeristurnedon.
Isthe"OUTOFRANGE"message
displayed?
ThisoccurswhensignalstransferredfromthePC(videocard)areout
ofthehorizontalorverticalfrequencyrangeofthemonitor.Pleasesee
the"ProductSpecification"sectionofthismanualtosettheappropri-
atefrequency.
Isthe"CHECKSIGNALCONNEC-
TION"messageisdisplayed?
ThisisdisplayedwhenthesignalcablebetweenthePCandthemoni-
torismissingordisconnected.Checkthecableandreconnect.
The screen retains an image.
Doesimagestickingoccureven
whenthemonitoristurnedoff?
Displayingastillimageforaprolongedtimemaycausedamagetothe
screen,resultingintheretentionoftheimage.
Useascreensavertoprotectthescreenwhenusingthemonitorfora
prolongedperiodoftime.
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hori-
zontalcycle.ThisiscalledhorizontalfrequencyandisrepresentedbykHz.
NOTE
The screen is flickering.
Didyouselecttherecommended
resolution?
IftheselectedresolutionisHDMI1080i60/50Hz,thescreen
maybeflickering.Changetheresolutiontotherecommended
resolution1080P.
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