External Monitor Problems - Lenovo ThinkPad P71 User Manual

• Problem: The screen is unreadable or distorted.
Solution: Ensure that:
– The display device driver is installed correctly.
– The screen resolution and color quality are correctly set.
– The monitor type is correct.
To check these settings, do the following:
1. Right-click on the desktop, and then click Display settings ➙ Display.
Note: If your computer cannot detect the external monitor, click Detect in the Display window.
2. Select the external monitor and set Resolution.
3. Click Display adapter properties.
4. Click the Monitor tab. Check the monitor information to make sure that the monitor type is correct. If
it is, click OK to close the window; otherwise proceed with the following steps.
5. If more than two monitor types are displayed, select Generic PnP Monitor or Generic Non-PnP
Monitor.
6. Click Properties. If you are prompted for an administrator password or confirmation, type the
password or provide confirmation.
7. Click the Driver tab.
8. Click Update Driver.
9. Click Browse my computer for driver software, and then click Let me pick from a list of available
drivers on my computer.
10. Clear the Show compatible hardware check box.
11. Select the correct manufacturer and model for the external monitor. If you cannot find your monitor
on the list, stop the installation of this driver and use the driver shipped with your monitor.
12. After updating the driver, click Close.
• Problem: Incorrect characters are displayed on the screen.
Solution: Ensure that you install the operating system and program correctly. If the problem persists, have
the computer serviced.
• Problem: I try to turn off my computer but the screen stays on and I cannot completely turn off my
computer.
Solution: Press and hold the power button for four seconds or more to turn off the computer.
• Problem: Missing, discolored, or bright dots appear on the screen every time I turn on my computer.
Solution: This is an intrinsic characteristic of the TFT technology. Your computer display contains multiple
thin-film transistors (TFTs). Only a very small number of missing, discolored, or bright dots on the screen
might exist all the time.

External monitor problems

• Problem: The external monitor is blank.
Solution: To bring up the image, press the display-mode switching key
want. If the problem persists, do the following:
1. Connect the external monitor to another computer to ensure that it works.
2. Reconnect the external monitor to your computer.
3. See the manual shipped with the external monitor to check the resolutions and refresh rates that are
supported.
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P71 User Guide
and select the monitor you