
Nacho Family Service Manual 12
Image Problems
The image is not correct.
The projector starts and runs normally.
The menus are accessible. The lamp is lit.
No video image
Bad or missing tint or color
Missing logo, VGA, composite video, or S-video
Distorted image, noisy, rolling, torn, frozen,
'plaid', repeated, or shifted image
Flash the projector
with the latest software.
Confirm that all image
adjustments are set to the
factory defaults. Select
Factory Reset from the
Settings > Service menu.
Confirm that the cables and the
source signals are good. Make
sure the signal is good.
What is the
problem?
Dim image
Replace the
controller ECA
(page 44)
Replace the
optical engine
(page 48)
Replace the color wheel assembly.
(page 40)
Substitute known
good lamp
Substitute a known
good controller
ECA.
(page 44)
Replace the
optical engine.
(page 52)
No computer image.
Vertical or horizontal
lines.
Sparkly picture.
Clusters of dark pixels.
Replace the I/O
ECA
(page 44)
Replace the
controller ECA
(page 44)
Replace the
optical engine
(page 52)
Image banding
Adjust the
horizontal or
vertical banding
(page 17)
Replace the
optical engine.
(page 52)
Replace the controller ECA.
(page 44)
Replace the light
tunnel
(page 58)
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