Application Programs; Networking Problems - Lenovo ThinkCentre M79 Hardware Maintenance Manual
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- Hardware maintenance manual (186 pages) ,
- User manual (154 pages) ,
- Safety, warranty, and setup manual (2 pages)
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• Press the power button to resume the computer from sleep or hibernation mode.
The monitor works when I turn on the computer, but goes blank when I start some
application programs
Solutions:
• Connect the monitor signal cable from your monitor to an appropriate connector on the computer. A
loose cable might cause intermittent problems.
• Install the device drivers for the application programs. Refer to the documentation for the affected
application program to check whether any device drivers are required.
The image appears to be flickering
Solutions:
• The screen might be affected by interference from nearby equipment. Magnetic fields around other
devices, such as transformers, appliances, fluorescent lights, and other monitors might be causing the
problem. Move fluorescent desk lighting or any equipment that produces magnetic fields farther away
from the screen. If this does not correct the problem, turn off the computer. Then, adjust the placement of
the computer and other devices so that they are at least 305 mm (12 inches) apart. Turn on the computer.
• Reset the refresh rate supported by your computer.
1. Right-click a blank area on the desktop.
2. Depending on your Windows version, do one of the following:
– For Windows 7 or Windows 8.1: Click Screen resolution ➙ Advanced settings.
– For Windows 10: Click Display settings. On the Display tab, click Advanced display settings ➙
Display adapter properties.
3. Click the Monitor tab, and then reset the refresh rate to be the highest and noninterlaced.
The image is discolored
Solution: The monitor might be affected by interference from nearby equipment. Move fluorescent desk
lighting or any equipment that produces magnetic fields further away from the monitor. If the problem
persists, do the following:
1. Turn off the monitor.
2. Adjust the placement of the monitor and other devices so that they are at least 305 mm (12 inches) apart.
3. Turn on the monitor.
Networking problems
This section provides solutions to networking-related problems.
Ethernet problems
Your computer cannot connect to the network
Symptom: Your computer cannot connect to the network.
Actions: Ensure that:
• The cable is installed properly.
The network cable must be securely connected to both the Ethernet connector of your computer and
the RJ45 connector of the hub. The maximum allowable distance from the computer to hub is 100
meters. If the cable is connected and the distance is within acceptable limits but the problem persists, try
a different cable.
.
Chapter 8
Troubleshooting and diagnostics
79
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Troubleshooting
