Sony GDM-400PST9 manual Color is not uniform, You cannot adjust the monitor, Sized properly

Additional Information

Symptom	Check these items
Color is not uniform	• Degauss the monitor (page 15).
	If you place equipment which generates a magnetic field, such as a loudspeaker, near the
	monitor, or you change the direction of the monitor, color may lose uniformity.
	The degauss function demagnetizes 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.
	• Adjust the landing (pages 13 – 14).
You cannot adjust the monitor	• If the control lock function is set to on, set it to off using the OPTION OSD (page 16).
with the buttons on the front
panel
White does not look white	• Adjust the color temperature (pages 12 - 13).
	• Check that the 5 BNCs are connected in the correct order (from left to right: Red–Green–
	Blue–HD–VD) (page 6).
Screen image is not centered or	• Press the ASC button (page 7).
sized properly	• Adjust the size or centering (page 10).
	• Some video modes do not fill the screen to the edges. This problem tends to occur with
	certain video boards.
Edges of the image are curved	• Adjust the geometry (page 11).
White lines show red or blue	• Adjust the convergence (pages 13 – 14).
shadows at edges
Picture is fuzzy	• Adjust the contrast and brightness (page 9).
	• Degauss the monitor (page 15).
	If you place equipment which generates a magnetic field, such as a loudspeaker, near the
	monitor, or you change the direction of the monitor, color may lose uniformity.
	The degauss function demagnetizes 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 shadows appear along the edges of images, adjust the convergence
	(pages 13 – 14).
	• If the moire is cancelled, the picture may become fuzzy. Decrease the moire cancellation
	effect (pages 13 – 14).
Picture bounces or has wavy	• Isolate and eliminate any potential sources of electric or magnetic fields. Common causes
oscillations	for this symptom are electric fans, fluorescent lighting or laser printers.
	• 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 different computer in a different room.
Picture is flickering	• Set the refresh rate on the computer to obtain the best possible picture by referring to the
	computer’s manual.
Picture appears to be ghosting	• Eliminate the use of video cable extensions and/or video switch boxes if this symptom
	occurs. Excessive cable length or a weak connection can produce this symptom.
Wavy or elliptical (moire)	• Cancel the moire (pages 13 – 14).
pattern is visible	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 sometimes show moire. Change your desktop pattern.
Two fine horizontal lines	• These wires stabilize the vertically striped aperture grille (page 19). This aperture grille
(wires) are visible	allows more light to pass through to the screen giving the Trinitron CRT more color and
	brightness.
Hum is heard right after the	• When the power is turned on, the auto-degauss cycle is activated. While the auto-degauss
power is turned on	cycle is activated (3 seconds), a hum may be heard. The same hum is heard when the
	monitor is manually degaussed. This is not a malfunction.

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