NEC Multi Sync EA221WM Service Manual page 14
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2.4 Image overlap, focus or flicker
Recommended frequency EA221WM: 1680×1050@60Hz
Image overlap, focus or flicker, color defect
OK
Factory Reset is executed.
NG
NG
OK
Change the resolution to
Is the input signal proper?
recommended frequency.
OK
NG
OK
Readjust the auto adjusts or clock
phase in the OSD user menu.
NG
OK
Replace MAIN PWB.
NG
Replace the LCD panel.
OK
End
2-5
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