NEC U321H - Troubleshooting Check List

Power
 Nopower(POWERindicatordoesnotlightgreen).
  Powercable'splugisfullyinsertedintothewalloutlet.
  Lampcoverisinstalledcorrectly.
  LampHoursUsed(lampoperationhours)wasclearedafter
lampreplacement.
  NopowereventhoughyoupressandholdthePOWER
buttonforaminimumof1second.
 Shutdownduringoperation.
  Powercable'splugisfullyinsertedintothewalloutlet.
  Lampcoverisinstalledcorrectly.
  PowerManagementisturnedoff(onlymodelswiththe
PowerManagementfunction).
Video and Audio
 NoimageisdisplayedfromyourPCorvideoequipmenttothe
projector.
  Stillnoimageeventhoughyouconnecttheprojectortothe
PCfirst,thenstartthePC.
  EnablingyournotebookPC'ssignaloutputtotheprojector.
  Acombinationoffunctionkeyswillenable/disablethe
externaldisplay.Usually,thecombinationofthe"Fn"key
alongwithoneofthe12functionkeysturnstheexternal
displayonoroff.
  Noimage(bluebackground).
  StillnoimageeventhoughyoupresstheAUTOADJUST
button.
  Stillnoimageeventhoughyoucarryout[RESET]inthe
projector'smenu.
  Signalcable'splugisfullyinsertedintotheinputconnector
Amessageappearsonthescreen.
  (_____________________________________________)
  Thesourceconnectedtotheprojectorisactiveand
available.
  Stillnoimageeventhoughyouadjustthebrightnessand/or
thecontrast.
  Inputsource’sresolutionandfrequencyaresupportedby
theprojector.
 Imageistoodark.
  Remainsunchangedeventhoughyouadjustthebrightness
and/orthecontrast.
 Imageisdistorted.
  Imageappearstobetrapezoidal(unchangedeventhough
  youcarryoutthe[KEYSTONE]adjustment).
 Partsoftheimagearelost.
  StillunchangedeventhoughyoupresstheAUTOADJUST
button.
  Stillunchangedeventhoughyoucarryout[RESET]inthe
projector'smenu.
 Imageisshiftedintheverticalorhorizontaldirection.
  Horizontalandverticalpositionsarecorrectlyadjustedona
computersignal.
  Inputsource'sresolutionandfrequencyaresupportedby
theprojector.
  Somepixelsarelost.
 Imageisflickering.
  StillunchangedeventhoughyoupresstheAUTOADJUST
button.
  Stillunchangedeventhoughyoucarryout[RESET]inthe
projector'smenu.
  Imageshowsflickeringorcolordriftonacomputersignal.
 Imageappearsblurryoroutoffocus.
  Stillunchangedeventhoughyoucheckedthesignal'sreso-
lutiononPCandchangedittoprojector'snativeresolution.
  Thethrowdistanceiswithin22.2to30.6cm(8.7"to12.1").

  Stillunchangedeventhoughyouadjustedthefocus.
 Nosound.
  Audiocableiscorrectlyconnectedtotheaudioinputofthe
projector.
  Stillunchangedeventhoughyouadjustedthevolumelevel.
Other
 Remotecontroldoesnotwork.
  Noobstaclesbetweenthesensoroftheprojectorandthe
remotecontrol.
  Projectorisplacednearafluorescentlightthatcandisturb
theinfraredremotecontrols.
  Batteriesarenewandarenotreversedininstallation
 Buttonsontheprojectorcabinetdonotwork.
  [CONTROLPANELLOCK]isnotturnedoninthemenu.
  StillunchangedeventhoughyoupressandholdtheEXIT
buttonforminimumof10seconds.
Troubleshooting Check List
Before contacting your dealer or service personnel, check the following list to be sure repairs are needed also by
referring to the “Troubleshooting” section in your user’s manual. This checklist below will help us solve your
problem more efciently.
* Print the following pages.
Frequency of occurrence always sometimes(Howoften?_______________________) other(__________________)