Monitor Care; Troubleshooting - Sharp IT-23M1U Manual De Funcionamiento

Troubleshooting

If you think the monitor may be faulty, please check the following points before taking it to be repaired.
If afterwards it still does not work, please contact the shop where you purchased the monitor or your
nearest Sharp authorized Service Center.
The monitor's fluorescent tubes have a limited life span.
- If the screen darkens, persistently flickers or does not light up, the fluorescent tube has reached the
end of its operational life span. Please inquire at the shop where you purchased the monitor or your
nearest Sharp authorized Service Center.
- In the initial period of use, due to the characteristics of fluorescent tubes the screen may flicker. (This
is not a malfunction.) Should this happen, check by first turning off the power, then turning it on again.
Problem
There is no picture.
(Power LED does not light.)
There is no picture.
(Power LED is lit orange.)
The image appears distorted.
The remote control does not work.
There is no TV picture.
A particular channel will not tune in.
There are stripes or dots on
TV picture.
The picture wavers.
The TV picture is doubled.
There are color bands.
The TV picture is distorted.
IT-23M1U_gb_02.P65
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Monitor care

What to Check
- Are the AC adapter and power cord properly connected? (Page E20)
- Is power turned on? (Page E25)
- Is the monitor properly connected to the computer? (Pages E14
and E15)
- Is the computer turned on?
- Is the PC signal input terminal (analog or digital) properly
selected? (Page E25)
- Does the computer's signal timing correspond to monitor
specifications? (Page E59)
- Is the computer in power-saving mode?
Try pressing a key on the keyboard or moving the mouse.
- Does the computer's signal timing correspond to monitor
specifications? (Page E59)
- If you are using the analog signal, perform automatic screen
adjustment. (Page E21)
- Change the Vsync frequency (refresh rate) on the computer you
are using to a low value if possible. (Page E59)
- Have the batteries of the remote control run out? (Page E11)
- Are the batteries placed in the right direction in the remote
control? (Page E11)
- Is the adjustment lock set? (Page E54)
- Is the monitor connected to an antenna? Check the connection.
(Pages E16 and E17)
- Is the monitor switched to TV mode? (Page E25)
- Have you set TV channels properly? (Pages E22 to E24)
- Did you set "BRIGHT MODE" to "OFF"? (Page E54)
- Have you set TV channels properly? (Pages E22 to E24)
- Is there interference from automobiles, trains, neon signs,
computers, or other sources?
- Place the antenna as far as possible away from potential
sources of interference.
- Place the antenna line as far as possible from the computer.
- Is the antenna is facing the right direction?
There may be reflected electric waves from nearby mountains
or buildings. Try changing the antenna's height and direction.
- Is there interference from a nearby TV?
Changing the antenna's height and direction may help.
- Try switching power off, waiting several seconds, and then
turning power back on.
E56
56 2004/08/20, 10:44