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- Can't connect to wifi
- Computer won't turn on properly
- Screen won't turn on
- Display shows yellows as browns
- Flickering Display/Uncontrollable Low Brightness
Can't connect to wifi ¶
Your device is unable to connect to wifi, or has an extremely weak connection.
Outdated Drivers ¶
Make sure to have the newest Lenovo wifi drivers, which can be downloaded from the Lenovo support page.
Power Saver ¶
The Yoga 2 Pro might be trying to save power at the cost of wifi connectivity-- this often happens when running on battery power.
Open Device Manager, then open Network Adapters. Click Intel® Wireless N 7260, Properties, and then Power Management. If checked, uncheck the box that reads “Allow the computer to turn off this device to save power.”
If none of the above work, try replacing your wireless module as detailed here.
Computer won't turn on properly ¶
The computer sleeps immediately after startup, or the critical low-battery error message appears and the computer turns off.
Machine is Overheating ¶
Ensure that the operating temperature is within acceptable limits. If not, let it cool before continuing.
Sleep Mode Malfunction ¶
If at any time during this process the power button is blinking, your laptop is in sleep mode. To wake it up, press the power button once. Make sure the computer is plugged into a power source, and that the Power button has been pushed during this time.
External Devices ¶
If you are using a high-power external device through your Yoga 2 Pro, make sure you are using a power adapter if necessary. Otherwise, the system may not recognize the device and shut down.
Other Issues ¶
If none of the above worked, or are relevant, reset your computer by holding the power button down for eight seconds. Any unsaved data may be lost, but this will not affect saved personal data.
If the device still fails to turn on, your battery may be defective. Check out how to replace it here.
Screen won't turn on ¶
Upon startup, nothing appears on the screen, there’s no visible response to startup, or there’s only a white cursor appearing on a blank or black screen.
Power Supply/Backlighting ¶
First, make sure the power supply is functioning using the steps above in the "Computer Won't Turn On Properly" section.
Press F9 to verify that the monitor backlight has not been turned off. Press F12 a couple times to verify that the backlighting is not too low to see.
Broken Display Component ¶
At this time, Lenovo suggests getting the computer serviced. Consider fixing replacing the screen yourself as detailed in this guide.
Note! Before you do either, attempt to restore your device using the Lenovo OneKey Recovery System. It backs up your personal data before setting the hard disk to the factory settings, then re-downloading your data.
Display shows yellows as browns ¶
Your Yoga 2 Pro displays all yellows as mustard or brown.
BIOS Outdated ¶
Before doing anything else, make sure all your data is saved and backed up.
Go to the Lenovo support page and find the link to update your BIOS, at this link.
Run the file that Lenovo downloaded. The computer will shut down and restart multiple times.
Note! It is very important that you do not power off the computer during this time, or else you risk permanent damage. When finished, the computer should restart normally and fully, ready for use.
Energy Manager Issues ¶
Open up Energy Manager, and click the rocket icon to enable
performance mode— this provides higher quality colors at the cost of some battery life.
Make sure your Energy Manager is updated to the newest version. This link can also be found on the Lenovo troubleshooting page, here.
Color Mix Manual Override Required ¶
In the Basic Options:
Set ‘Red’ to
Brightness: -3, Contrast: 50, Gamma: 1.3
Set ‘Green’ to
Brightness: -1, Contrast: 48, Gamma: 1.2
Set ‘Blue’ to
Brightness: -4, Contrast: 48, Gamma: 1.2
In the Advanced Options, set ‘Color Enhancement’ to
Hue: 355, Saturation: 21”
Flickering Display/Uncontrollable Low Brightness ¶
Your device has uncontrollable screen flickering, or brightness adjustments that render the machine unusable.
Auto-Brightness Malfunction ¶
This feature can develop a problem where it incorrectly reads light levels and makes the screen adjust brightness at inconvenient times.
Within Settings, select ‘Change PC setting’ in the lower right corner.
In PC Settings, tap "PC and devices"
Under ‘PC and devices’, tap ‘Power and Sleep’. Drag the slide control for “Brightness” to the left to turn it off.
Graphics Properties Issues ¶
Right click on the desktop and select ‘graphics properties.’
In the ‘on battery’ tab, turn off ‘Display Power Saving Technology.’
Power Plan Issues ¶
Right click the start menu and choose ‘Power Options’, then, ‘Change Plan Settings’.
Set the brightness according to your preference under the ‘On battery’ and ‘Plugged in’ modes.