Lenovo ThinkSmart Core Hardware Maintenance Manual page 33

Problem
ThinkSmart Controller screen goes blank
while ThinkSmart Core is on.
The ThinkSmart Controller screen image
appears to be flickering.
The ThinkSmart Controller screen image is
discolored.
An external display screen is blank after
connected to ThinkSmart Core.
The image on an external display is not clear.
Solution
• Ensure that ThinkSmart Controller is connected to ThinkSmart
Core correctly and securely.
• Tap the ThinkSmart Controller screen to wake up the ThinkSmart
Core.
• The brightness and contrast is set correctly.
• ThinkSmart Core voltage matches the voltage available at the
electrical outlet for your country or region.
• The ThinkSmart Controller screen might be affected by interference
from nearby equipment. Magnetic fields around other devices,
such as transformers, appliances, fluorescent lights, and other
displays, might be causing the problem. Move fluorescent desk
lighting or any equipment that produces magnetic fields farther
away from the screen. If the problem persists, turn off ThinkSmart
Core. Keep other devices at least 305 mm (12 inches) away from
ThinkSmart Core. Then, turn on ThinkSmart Core.
• Reset the refresh rate.
1. Right-click a blank area on the desktop.
2. Click Display settings. On the Display tab, click Advanced
display settings ➙ Display adapter properties for Display 1.
3. Click the Monitor tab, and then reset the refresh rate to be the
highest and non-interlaced.
• The ThinkSmart Controller screen might be affected by interference
from nearby equipment. Move fluorescent desk lighting or any
equipment that produces magnetic fields farther away from the
screen.
• Turn off ThinkSmart Core. Keep other devices at least 305 mm (12
inches) away from ThinkSmart Core. Then, turn on ThinkSmart
Core.
• Ensure that the display is connected to ThinkSmart Core correctly
and securely.
• Select HDMI signals in the signal source setting of the display.
• Restart the display.
• Change the HDMI cable.
Reset the screen resolution.
• Right-click a blank area on the desktop.
• Click Display settings.
• Set the screen resolution to be 1920 x 1080 pixels.
.
Chapter 6 Troubleshooting, diagnostics, and recovery
27