HP Xw8400 HP xw8400 Service and Technical Reference Guide - Page 126

Solving audio problems, Table 5-8

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Table 5-7 Display problems (continued) Problem Cause Solution Blurry video or requested resolution cannot be set. If the graphics controller was upgraded, the correct video drivers might not be loaded. Install the video drivers included in the upgrade kit. Monitor is not capable of displaying requested resolution. Change requested resolution. The picture is broken up, rolls, jitters, or flashes. The monitor connections might 1. be incomplete or the monitor might be incorrectly adjusted. 2. Be sure the monitor cable is securely connected to the workstation. In a two-monitor system or if another monitor is in close proximity, be sure the monitors are not interfering with each other's electromagnetic field by moving them apart. 3. Be sure that fluorescent lights or fans are not too close to the monitor. Monitor needs to be degaussed. Degauss the monitor. Vibrating or rattling noise coming from inside a CRT monitor when powered on. Monitor degaussing coil has been activated. None. It is normal for the degaussing coil to be activated when the monitor is powered on. Clicking noise coming from inside a Electronic relays have been CRT monitor. activated inside the monitor. None. It is normal for some monitors to make a clicking noise when turned on and off, when going in and out of Standby mode, and when changing resolutions. High pitched noise coming from inside a flat panel monitor. Brightness and contrast settings are too high. Lower brightness and contrast settings. Fuzzy focus; streaking, ghosting, or shadowing effects; horizontal scrolling lines; faint vertical bars; or unable to center the picture on the screen. (Flat panel monitors using an analog VGA input connection only.) Flat panel monitor's internal digital conversion circuits might be unable to correctly interpret the output synchronization of the graphics card. 1. Select the monitor's Auto-Adjustment option in the monitor's on-screen display menu. 2. Manually synchronize the Clock and Clock Phase onscreen display functions. Download SoftPaq SP20930 or SP22333, depending on the monitor, to assist with the synchronization. Certain typed symbols do not appear correct. The font you are using does not support that particular symbol. Use the Character Map to locate the and select the appropriate symbol. Click Start>All Programs> Accessories>System Tools>Character Map. You can copy the symbol from the Character Map into a document. Solving audio problems Table 5-8 Audio problems Problem Sound does not come out of the speaker or headphones. Cause Solution Software volume control is turned down. Double-click the Speaker icon on the taskbar and use the volume slider to adjust the volume. The external speakers are not Turn on the external speakers. turned on. External speakers are plugged See the sound card documentation for proper speaker into the wrong audio jack. connection. 116 Chapter 5 System diagnostics and troubleshooting ENWW

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Problem
Cause
Solution
Blurry video or requested
resolution cannot be set.
If the graphics controller was
upgraded, the correct video
drivers might not be loaded.
Install the video drivers included in the upgrade kit.
Monitor is not capable of
displaying requested
resolution.
Change requested resolution.
The picture is broken up, rolls,
jitters, or flashes.
The monitor connections might
be incomplete or the monitor
might be incorrectly adjusted.
1.
Be sure the monitor cable is securely connected to the
workstation.
2.
In a two-monitor system or if another monitor is in
close proximity, be sure the monitors are not
interfering with each other’s electromagnetic field by
moving them apart.
3.
Be sure that fluorescent lights or fans are not too close
to the monitor.
Monitor needs to be
degaussed.
Degauss the monitor.
Vibrating or rattling noise coming
from inside a CRT monitor when
powered on.
Monitor degaussing coil has
been activated.
None. It is normal for the degaussing coil to be activated
when the monitor is powered on.
Clicking noise coming from inside a
CRT monitor.
Electronic relays have been
activated inside the monitor.
None. It is normal for some monitors to make a clicking
noise when turned on and off, when going in and out of
Standby mode, and when changing resolutions.
High pitched noise coming from
inside a flat panel monitor.
Brightness and contrast
settings are too high.
Lower brightness and contrast settings.
Fuzzy focus; streaking, ghosting,
or shadowing effects; horizontal
scrolling lines; faint vertical bars; or
unable to center the picture on the
screen. (Flat panel monitors using
an analog VGA input connection
only.)
Flat panel monitor’s internal
digital conversion circuits
might be unable to correctly
interpret the output
synchronization of the
graphics card.
1.
Select the monitor’s Auto-Adjustment option in the
monitor’s on-screen display menu.
2.
Manually synchronize the Clock and Clock Phase on-
screen display functions. Download SoftPaq
SP20930 or SP22333, depending on the monitor, to
assist with the synchronization.
Certain typed symbols do not
appear correct.
The font you are using does
not support that particular
symbol.
Use the Character Map to locate the and select the
appropriate symbol. Click
Start>All Programs>
Accessories>System Tools>Character Map
. You can
copy the symbol from the Character Map into a document.
Solving audio problems
Table 5-8
Audio problems
Problem
Cause
Solution
Sound does not come out of the
speaker or headphones.
Software volume control is
turned down.
Double-click the
Speaker
icon on the taskbar and use the
volume slider to adjust the volume.
The external speakers are not
turned on.
Turn on the external speakers.
External speakers are plugged
into the wrong audio jack.
See the sound card documentation for proper speaker
connection.
Table 5-7
Display problems (continued)
116
Chapter 5
System diagnostics and troubleshooting
ENWW