Troubleshooting

Symptom	Check these items
Screen image is not centered	• Adjust the centering or size (pages 10, 14).
or sized properly	• Some video modes do not fill the screen to the edge of the monitor. There is no single
	answer to solve the problem. This problem tends to occur on higher refresh timings.

Edges of the image are	• Adjust the geometry items such as pincushion and keystone distortion (page 11, 14).
curved

White lines show red or blue shades at edges

• Adjust the convergence (pages 11, 14).

Picture is fuzzy	• Adjust the contrast and brightness (page 9).
	• Degauss the monitor (page 16).
	If you place equipment which generates a magnetic field such as a loudspeaker, or you
	change the direction of the monitor, color may lose uniformity.
	This function is to demagnetize the metal frame of the CRT to obtain a neutral field for
	uniform color reproduction. If a second degauss cycle is needed, allow a minimum
	interval of 20 minutes for the best result.
	• If red or blue shades are found at the edge of images, adjust the convergence (pages 11,
	14).
	• If the moire is cancelled, the picture may become fuzzy. Adjust so that the picture is as
	clear as possible (page 11, 15).

Picture bounces or has wavy oscillations

•Isolate and eliminate any potential sources of electric or magnetic fields. Common causes for this symptom are electric fans, fluorescent lighting, laser printers, and so on.

•If you have another monitor close to this monitor, increase the distance between them to reduce the interference.

•Try plugging the monitor into a different AC outlet, preferably on a different circuit.

•Try the monitor on a completely different computer in a different room.

Picture is not stable	• Set the refresh rate to non-interlace of 75 Hz or more on the computer referring to the
	computer’s manual.

Picture appears to be	• Eliminate the use of video cable extension cable and/or video switch boxes if this
ghosting	symptom occurs. Excessive cable length or weak connection can produce this symptom.

Two fine horizontal lines	• These wires stabilize the vertically striped Aperture Grille (page 17). This Aperture Grille
(wires) are visible	allows more light to pass through to the screen giving the Trinitron CRT more color and
	brightness.

Wavy or elliptical (moire) pattern is visible

•Cancel the moire (page 11, 15).

The moire may be modified depending on the connected computer.

•Due to the relationship between resolution, monitor dot pitch and the pitch of some image patterns, certain screen backgrounds, especially gray, sometimes show moire. Change your desktop pattern.

Hum is heard right after the							• When the power is turned on, the auto-degauss cycle is activated. While the Auto-
power is turned on							degauss cycle is activated, a hum may be heard. This is not a malfunction.

Because of vibration and							• Lightly pat the sides of the monitor.
shock during transportation,
the Aperture Grille may
occasionally slip out of place
and black stripes may
appear