HP COMPAQ DC5750 Troubleshooting Guide download pdf (Page 31)

Vibrating or rattling noise coming from inside a CRT monitor when powered on.

Cause

Solution

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.

Cause

Solution

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.

Cause

Solution

Brightness and/or contrast settings are too high. Lower brightness and/or 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).

Cause

Solution

Flat panel monitor’s internal digital conversion circuits may 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. 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

Graphics card is not seated properly or is bad. 1. Reseat the graphics card.

2. Replace the graphics card.

Certain typed symbols do not appear correct.

Cause

Solution

The font you are using does not support that particular symbol. Use the Character Map to locate 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.

Table 2-6 Solving Display Problems (continued)

ENWW Solving Display Problems 25

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 71 72

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HP COMPAQ DC5750 Troubleshooting Guide Page 31