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Lenovo ThinkPad X390 Troubleshooting
Released February 2019.
Computer Will Not Power On
The computer will not turn on when the power button is pressed.
If your Lenovo ThinkPad X390 will not turn on, there is most likely an issue with the battery. To prevent this in the future, avoid overcharging your laptop (charging when not needed).
Faulty Power Supply
It’s possible that the laptop is fine, and you are not getting power because either the outlet or power cord are broken. If the computer will not turn on and the light next to the charging port on the laptop is not lit, the power supply is not supplying power to the computer. Check to ensure the power supply is plugged in to a power source properly and there are no issues with the power supply cable.
Faulty Power Button
The power button may be misaligned or broken, but you can potentially still turn on the laptop without it. Check to see if the laptop will power on when the Novo port on the side of the laptop is pressed with a pin. If so then the issue is with the power button itself and you should contact Lenovo Support.
Defective USB-C Port
If the USB-C port is not working, you are not getting any HDMI output, or the computer is not charging, then the USB-C port may be defective.
Missing drivers seem to be a common issue in Lenovo computers, there is not much that you will be able to do in order to prevent this problem. It is possible that a driver is missing, in which case it can be downloaded from the Lenovo support page: https://support.lenovo.com/us/en/. Otherwise, you should contact Lenovo Support.
Wireless Connectivity is Not Working
You can connect to a network, however the connection is unstable and there is frequent drop signals.
If the wireless connectivity is not working on your Lenovo ThinkPad, it could be because of several reasons. First, your flight mode could have accidentally gotten turned on. This is a simple fix, however, as you just need to turn it back off. The next couple of reasons can get a little more tricky.
Missing WiFi Drivers
Again, missing drivers are a common problem in Lenovo laptops and there is not much that you can do in order to prevent this from happening. Lacking an up to date driver may make your laptop incompatible with your Wi-Fi connection. Make sure Wi-Fi drivers are up to date: Go to https://support.lenovo.com, Select Detect Product. Select Drivers & Software. Select Automatic Updates and scan for updates. Run the Windows troubleshooter. Right-click the Wi-Fi icon and select Troubleshoot problems.
The reason for this is a hardware issue. You can prevent this by remembering to constantly update your network adapter driver. The network adapter is a piece of hardware in your laptop that connects you to a Wi-Fi modem. It may be broken. Locate the network adapter by going to control panel, and then device manager. Select uninstall, then scan for hardware changes, press restart and try again.
Laptop is Overheating
The Computer is shutting down or turning off or the startup screen says “Fan Error”: there might be hot spots around the computer’s processor.
If your Lenovo laptop is overheating, the main prevention method for this is to just simply take care of your computer. This includes frequently cleaning the internal components, such as your vents and fans. You could also try to lower the temperature in the room in order to give the laptop the optimal environment.
Try performing a BIOS update. Visit Lenovo’s support site: https://support.lenovo.com/us/en/, find your model number and check if you have any BIOS updates pending.
If the fans are clogged or have too much debris, they will not be able to spin fast enough to effectively cool your laptop. Try cleaning out the fans. Disassemble the laptop by taking off the back cover and make sure that the fan and the cooling fin stack is not clogged up with dirt or debris. Use a soft bristle brush to clean out the debris.
If your battery is discharging too much energy, it could cause the laptop to heat up. Try running your laptop through a power cycle. Disconnect from the AC power and take off the back cover of the laptop, which will expose your battery. Remove the battery from the laptop, then hold down the power button for 30 seconds and replace the battery and reconnect to the AC adapter and power up. Alternatively, you can use this guide to replace the battery in your device.
If all else fails, you may need to replace the fan. Use this guide to replace the fan for the Lenovo ThinkPad X390.
Computer is Stuck on Black Screen
Your laptop is stuck on a constant black screen. This is likely caused by a hardware error, faulty battery, faulty display, continual overheating, or power supply issue.
Most of the time the reason for a black screen issue is a glitch when the operating system loses its connection to the screen display. Unfortunately, there is not anything that you can do to prevent a glitch issue, however try the next few solutions if the issue arises.
Sometimes the graphics card fails to register updates to the display. Reset the display by pressing Windows+Control+Shift+B simultaneously.
It may be that the computer is fine, but the monitor is broken. Connect an external monitor to test the display with an HDMI cord. Once the two are connected, click on the 'Fn' key and 'CRT/LCD' tab (either F5 or F8). Keep on clicking on it until the content of your laptop is displayed. If it is displayed, you can save all of your data on the hard drive and go get your display fixed.
Interference from Non-Essential Devices
In some cases, the laptop may attempt to display something from a device other than the computer. Try disconnecting all of the non-essential devices that could possibly cause a display issue, such as anything in the USB ports, flash drives, discs, etc.
Press Control+Shift+Escape to open up task manager. Click on the details tab, find explorer.exe and click end task. This will remove the GUI elements from your screen. To restart the task, press Windows+R and type explorer.exe, then press enter.