HP 260 Maintenance and Service Guide - Page 70

Solving display problems

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Solving display problems If you encounter display problems, see the documentation that came with the monitor and to the common causes and solutions listed in the following table. Blank screen (no video). Cause Monitor is not turned on and the monitor light is not on. Bad monitor. The cable connections are not correct. You may have a screen blanking utility installed or energy saver features are enabled. System ROM is corrupted; system is running in Boot Block Emergency Recovery Mode (indicated by eight beeps). You are using a fixed-sync monitor and it will not sync at the resolution chosen. Computer is in Sleep state. Monitor cable is plugged into the wrong connector. Monitor settings in the computer are not compatible with the monitor. Monitor is configured to use an input that is not active. Solution Turn on the monitor and check that the monitor light is on. Try a different monitor. Check the cable connection from the monitor to the computer and to the electrical outlet. Press any key or click the mouse button and type your password (if set). Reflash the system ROM with the latest BIOS image. Be sure that the monitor can accept the same horizontal scan rate as the resolution chosen. Press the power button to resume from Sleep state. CAUTION: When attempting to resume from Sleep state, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data. Systems may have a monitor connection on both the motherboard or an add-in card. Try moving the monitor connection to a different connector on the back of the computer 1. In Control Panel, select Category from the View by list, then under Appearance and Personalization, select Adjust screen resolution. To access Control Panel in Windows 7, click Start, and then select Control Panel. To access Control Panel in Windows 8.1, from the Start screen, type c, and then select Control Panel from the list of applications. 2. Expand the Resolution box, and then use the sliding control to reset the resolution. Use the monitor's on-screen menu controls to select the input that is being driven by the system. Refer to the monitor's user documentation for more information on the on-screen controls and settings. Blank screen and the power LED flashes red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Pre-video memory error. 1. Reseat DIMMs. Power on the system. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 62 Chapter 6 Troubleshooting without diagnostics

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Solving display problems
If you encounter display problems, see the documentation that came with the monitor and to the common
causes and solutions listed in the following table.
Blank screen (no video).
Cause
Solution
Monitor is not turned on and the monitor light is not on.
Turn on the monitor and check that the monitor light is on.
Bad monitor.
Try a different monitor.
The cable connections are not correct.
Check the cable connection from the monitor to the computer and
to the electrical outlet.
You may have a screen blanking utility installed or energy saver
features are enabled.
Press any key or click the mouse button and type your password
(if set).
System ROM is corrupted; system is running in Boot Block
Emergency Recovery Mode (indicated by eight beeps).
Reflash the system ROM with the latest BIOS image.
You are using a fixed-sync monitor and it will not sync at the
resolution chosen.
Be sure that the monitor can accept the same horizontal scan rate
as the resolution chosen.
Computer is in Sleep state.
Press the power button to resume from Sleep state.
CAUTION:
When attempting to resume from Sleep state, do not
hold down the power button for more than four seconds.
Otherwise, the computer will shut down and you will lose any
unsaved data.
Monitor cable is plugged into the wrong connector.
Systems may have a monitor connection on both the
motherboard or an add-in card. Try moving the monitor
connection to a different connector on the back of the computer
Monitor settings in the computer are not compatible with the
monitor.
1.
In Control Panel, select
Category
from the
View by
list, then
under
Appearance and Personalization
, select
Adjust
screen resolution
.
To access Control Panel in Windows 7, click
Start
, and then
select
Control Panel
.
To access Control Panel in Windows 8.1, from the Start
screen, type
c
, and then select
Control Panel
from the list
of applications.
2.
Expand the
Resolution
box, and then use the sliding control
to reset the resolution.
Monitor is configured to use an input that is not active.
Use the monitor's on-screen menu controls to select the input
that is being driven by the system. Refer to the monitor's user
documentation for more information on the on-screen controls
and settings.
Blank screen and the power LED flashes red five times, once every second, followed by a two second pause, and the computer
beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.)
Cause
Solution
Pre-video memory error.
1.
Reseat DIMMs. Power on the system.
2.
Replace DIMMs one at a time to isolate the faulty module.
3.
Replace third-party memory with HP memory.
62
Chapter 6
Troubleshooting without diagnostics