Solving Audio Problems - HP ProDesk 400 G2.5 Maintenance And Service Manual

High pitched noise coming from inside a flat panel monitor.
Cause
Brightness and/or contrast settings are too high.
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).
Cause
Flat panel monitor's internal digital conversion circuits may be
unable to correctly interpret the output synchronization of the
graphics card.
Graphics card is not seated properly or is bad (some models).
Certain typed symbols do not appear correct.
Cause
The font you are using does not support that particular symbol.

Solving audio problems

If the computer has audio features and you encounter audio problems, see the common causes and solutions
listed in the following table.
Sound cuts in and out.
Cause
Processor resources are being used by other open applications.
Solution
Lower brightness and/or contrast settings.
Solution
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. To download a SoftPaq that will assist
you with the synchronization, go to the following Web site,
select the appropriate monitor, and download either
SP32347 or SP32202: http://www.hp.com/support
1. Reseat the graphics card.
2. Replace the graphics card.
Solution
Use the Character Map to locate and select the appropriate
symbol. You can copy the symbol from the Character Map into a
document.
In Windows 7, click Start, select All Programs, select
Accessories, select System Tools, and then select Character
Map.
In Windows 8, on the Start screen, type ch, and then select
Character Map from the list of applications.
Solution
Shut down all open processor-intensive applications.
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