Lenovo 10YC, Hardware Maintenance Manual, Page: 52 / 106

Solutions:
• Ensure that all cables and cords are securely connected to the computer and connected devices.
• Ensure that when the computer is on, the fan grill is not blocked (there is air flow around the grill), and the
fans are working. If airflow is blocked or the fans are not working, the computer might overheat.
• If Small Computer System Interface (SCSI) devices are installed, ensure that the last external device in
each SCSI chain is terminated correctly. For more information, see your SCSI documentation.
Screen problems
This section provides solutions to screen-related problems.
My screen goes blank while the computer is on
Solutions:
• The computer voltage matches the voltage available at the electrical outlet for your country or region.
• Press a key to exit the screen saver.
• Press the power button to resume the computer from sleep or hibernation mode.
• The brightness and contrast is set correctly.
• If the screen goes blank when I start some application programs, 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 is discolored
Solution: The screen might be affected by interference from nearby equipment. Move fluorescent desk
lighting or any equipment that produces magnetic fields further away from the screen. If the problem
persists, do the following:
1. Turn off the computer.
2. Adjust the placement of the computer and other devices so that they are at least 305 mm (12 inches)
apart.
3. Turn on the computer.
Networking problems
This section provides solutions to networking-related problems.
Ethernet LAN problems
My computer is a Gigabit Ethernet model and I use a speed of 1000 Mbps, but the connection fails or
errors occur
Solution: Connect the network cable to the Ethernet connector using Category 5 wiring and a 100 BASE-T
hub/switch (not 100 BASE-X).
My computer is a Gigabit Ethernet model, but it cannot be connected to the network at 1000 Mbps,
but at only 100 Mbps
Solutions:
• Try another cable.
• Set the link partner to auto-negotiate.
• Set the switch to be 802.3ab-compliant (gigabit over copper).
18
M710q Hardware Maintenance Manual