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Troubleshooting
The following table shows what to do to solve problems
when the TV Tuner does not work correctly.
Problem Probable Cause
The TV Tuner
does not
operate.
(No picture or
sound)
Computer is not powered on.
Computer is in suspend mode.
Volume control of the TV Tuner or
computer is not adjusted correctly.
The power for the TV Tuner is not
supplied. (See “Power-on the TV
Tuner” on page 603.)
The wall outlet from the outdoor
antenna is not active.
The video or antenna cable is not
connected correctly.
Antenna elements of the active
antenna unit are not adjusted.
The batteries in the active antenna
unit are not inserted correctly.
The batteries in the active antenna
unit are depleted.
The TV Tuner is not set up
correctly.
You cannot watch TV or videos on
the external display.
LO is set for the auto tune
sensitivity selection. (See page
601.)
No color. The program is not in color.
Snow and noise
only.
Switch the TV/EXT ( ) button.
Pictures are out
of shape, or
have double
images.
For TV:
The channel is not tuned correctly.
Adjust the antenna.
For VCR:
Change the tracking adjustment.
Dotted lines or
stripes.
Usually caused by interference
from neon signs, hair dryers, and
so on. Move the computer to
avoid the interference.
Picture control
are not saved.
Do not power-off the TV Tuner
when adjusting functions such as
picture control, color, tint,
brightness, or contrast.
Channel number
is always
displayed or is
not displayed.
Select your favorite mode for the
on-screen message. (See page 601.)
604 IBM Mobile Systems - ThinkPad HMM Volume 3