Mitsubishi Electronics LT-40151 Flat Panel Television User Manual


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82 Appendices
Appendix E: Troubleshooting, continued
Picture
Symptom Remarks
1. Picturedoesnotlooklikeahigh-definition
picture.
Notallsignalsarehigh-definitionsignals.Toreceivehigh-defini-
tionprogrammingfromyourcableorsatelliteprovider,youmust
subscribetotheprovider’shigh-definitionservice.Someover-
the-airbroadcastsareinhigh-denitionandcanbereceivedwith
ahigh-qualityantennasuitedtoyourlocation.
2. TVhassoundbutnopicture. Checkthatallvideoinputsarepluggedinfirmly.•
PressandholdthePOWERbuttononthecontrolpanelfor•
tensecondstoperformSystemReset.
3. Picturehasbecomedimmer. Adjustpicturebrightnessandcontrasttomaximumlevels.
4. Thereisalargeblackorgrayrectangleon
thescreen.
TheTV’sanalogclosedcaptioninghasbeensetto“text”mode
intheCaptionsmenu.Turnoffbecausethereisnotextinforma-
tionbeingbroadcast.
5. Youcannotviewapicturewhenplayinga
VHStape.
CheckyourVCR’sowner’sguideforfurthertroubleshooting.
6. VCRorDVDplayer’son-screenmenusjitter
upanddown.
Stopplayback.Possiblecause:ManyVCRsandDVDplayers
provideon-screenmenusatonlyhalf-resolutionthatmay
appeartojitterupanddown.
7. WhenviewingastoppedVCR,whitelines
arerollingonthescreen.
• TurnoffvideomutefortheVCR.
• Beginplayingthetape.
• ChangetheVCRinputfromLine1totheVCRantennainput.
8. Acolorprogramappearsasablackand
whiteimage,orthecolorsaredim,orthe
screenisblack.
ThePerfectColorcolorbalancehasbeenincorrectlyset.Reset
thePerfectColorbalance.
9. PicturefromanHDMIinputisnoisy(poor
quality).
UpgradeaCategory1(unmarked)HDMIcabletoaCategory2
high-speedHDMIcable.
10. Theimagefromacomputerappearsdis-
tortedwhenviewedontheTV.
NormalTVoperation.TheTVdoesnotcorrectdistortionin•
thepicturefromacomputerbecausethecorrectionprocess
maycutofftheedgesoftheimage.
Theaspectratiomaybewrongfortheimage.PressMORE•
andthen0(FORMAT)tochange.
Sound
Symptom Remarks
1. Thereisnosoundevenwhenthe
volumeisturnedup.
• CheckiftheMUTEkeyison.
• TheTV’s“Listento:”settingmaybesettoSAP(analogprogram
fromtheANTinput)butnoSAPisbeingbroadcast.
• CheckthattheSpeakersoptionissettoTVtohearsoundfrom
theTVspeakers.Possiblysoundisbeingsenttooneoftheaudio
outputsforanA/Vreceiverorheadphones.
• IfusinganA/Vreceiver,checkthattheSpeakersoptionissettoAV
ReceivertohearsoundfromtheA/Vreceiverspeakers.
•
PressandholdthePOWERbuttononthecontrolpanelfor10
secondstoperformSystemReset.
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