28 Chapter6Troubleshooting
Problem Possible cause and remedy
• Themessageshowsthattheinputsignalisout
ofthespeciedfrequencyrange.(Suchsignal
frequencyisdisplayedinmagenta.)
Example:
fD: Dotclock
fH: Horizontalscanfrequency
fV: Verticalscanfrequency
• CheckwhetherthePCisconguredtomeetthe
resolutionandverticalscanfrequencyre quirements
ofthemonitor(see“CompatibleResolutions”inthe
SetupManual.).
• RebootthePC.
• Selectanappropriatedisplaymodeusingthegraphics
board’sutility.Refertothemanualofthegraphics
boardfordetails.

Imaging problems

Problem Possible cause and remedy
3. The screen is too bright o r too dark. • Use<Brightness>or<Contrast>intheAdjustment
menutoadjustit.(TheLCDmonitorbacklighthasa
limitedlifespan.Whenthescreenbecomesdarkor
beginstoicker,contactyourlocaldealer.)
4. Characters are blu rred. • CheckwhetherthePCisconguredtomeetthe
resolutionandverticalscanfrequencyre quirements
ofthemonitor(see“CompatibleResolutions”inthe
SetupManual.).
5. Afterimages ap pear. • AfterimagesareparticulartoLCDmonitors.Avoid
displayingthesameimageforalongtime.
• Usethescreensaverorpowersavefunctiontoavoid
displayingthesameimageforextendedperiodsof
time.
6. Green/red/blue /white dots or defective
dots remain on the screen.
• ThisisduetoLCDpanelcharacteristicsandisnota
failure.
7. I nterference patter ns or pressure marks
remain on the screen.
• Leavethemonitorwithawhiteorblackscreen.The
symptommaydisappear.