Sharp PN-K321H - Troubleshooting Common Issues

27
E
Troubleshooting
If you are experiencing any problem with your display, before
calling for service, please review the following troubleshooting
tips.
There is no picture or sound.
• AretheACadapterandpowercordproperlyconnected?
(See page 13.)
• Isthemainpowerswitchoff?(Seepage15.)
• Isthemonitorinstandbymode(powerlampisoff)?(See
page15.)
• Ifanyexternalequipmentisconnected,makesurethe
equipmentisoperating(playingback).
Sound from left and right speakers is reversed.
Sound is heard from only one side.
• Areaudiocablesconnectedproperly?(Seepage12.)
There is a picture but no sound.
• Isthesoundmuted?
• Makesurethevolumeisnotsettominimum.
• Areaudiocablesconnectedproperly?
• IsthesettingofAUDIOSELECTontheSETUPmenu
correct?(Seepage20.)
• Istheheadphone(etc.)cableconnectedtotheheadphone
terminal?
The sound crackles.
• Turndownthevolume.
Withsomeinputdevices,thesoundmaycrackleathigh
volume.
Unstable video.
• Thesignalmaybeincompatible.
The video from DisplayPort input terminal does not
appear properly.
• IsthecableacertiedDisplayPortcable?Usethesupplied
cable.Themonitorwillnotworkunlessastandards-
compliant cable is used.
• Istheinputsignalcompatiblewiththismonitor?
(Seepage30.)
The video does not appear properly even after the
DisplayPort STREAM setting is changed.
• Tryrestartingthemonitorandcomputer.
• IsthevideocardMST(MultiStream)compatible?Ifnot,set
toSST(SingleStream).
Control buttons do not work.
There is no picture.
• Loadnoisesfromoutsidemaybeinterferingwithnormal
operation.Turnoffthepowerandturnitonafterwaitingat
least5seconds,andthenchecktheoperation.
• Whenyoudisplaythescreenorclearthescreen,theleft
and right screen display timing may be slightly off; however,
this is not a problem.
Power LED ashes red.
“STATUS [xxxx]” appears in the corner of the screen.
• Hardwarehasaproblem.Turnoffthemonitorandrequest
repairfromyourSHARPdealer.
(WhenSTATUSALERTissettoOSD&LED.Thisvaries
depending on the setting.)
When “AUTO DIMMING” is displayed.
•
When the internal temperature of the monitor rises excessively,
thebrightnessofthebacklightautomaticallydecreasesin
order to prevent a further temperature rise.
If you attempt to use brightness adjustment button (
/ ) to
adjustthebrightnesswhilethemonitorisinthisstate,“AUTO
DIMMING”isdisplayedandyoucannotchangethebrightness.
• Removethecauseoftheexcessivetemperaturerise.
The monitor makes a cracking sound.
• Youmayoccasionallyhearacrackingsoundfromthe
monitor.Thishappenswhenthecabinetslightlyexpands
andcontractsaccordingtochangeintemperature.This
does not affect the monitor’s performance.
The Power LED is ashing in red and green alternately.
When “TEMPERATURE” is displayed in the corner of the
screen.
• Whentheinternaltemperatureofthemonitorrises
excessively,thebrightnessofthebacklightdecreases
automaticallyinordertopreventhigh-temperature-
relatedproblems.Whenthisoccurs,“TEMPERATURE”is
displayedonthescreenandthePowerLEDashesred
andgreenalternately.(WhenTEMPERATUREALERTis
settoOSD&LED.Thisvariesdependingonthesetting.)
• Iftheinternaltemperaturerisesfurther,themonitor
automaticallyentersstandbymode.(ThePowerLED
continuesashingredandgreenalternately.)
• Removethecauseoftheexcessivetemperaturerise.
-Ifthemonitorentersstandbymodeduetoarisein
temperature, to return to normal display, turn the power
switchoffandthenbackonagain.Themonitor,however,
will enter standby mode again if the cause of the
temperature rise is not eliminated. (See page 7.)
-Checkwhetherthemonitorisplacedatalocationwhere
aquickriseintemperatureislikely.Internaltemperature
risesquicklyiftheventsonthemonitorareblocked.
-Internaltemperaturerisesquicklyifdustaccumulates
insidethemonitororaroundthevents.Removedustif
possible.AskSHARPdealeraboutremovinginternaldust.
A residual image has occurred.
After the image has changed, the previous image is faintly
visible.
• Displayingthesameimageforanextendedtimemay
cause a residual image.
• Toimprovearesidualimage,keepthepoweroff.Withthe
power off state, the residual image will gradually disappear
as time passes. If there is no improvement, display a full
white screen or an animated image.