LG Nexus 5X Manuel utilisateur

LG Nexus 5X

Troubleshoot a screen that isn't working

correctly

If your Android phone or tablet's screen isn't responding, or if you're seeing flickering, jumping,

flashing, dead pixels or a blank screen, try these quick fixes and troubleshooting steps.

After trying each recommended solution, check to see whether it fixed your issue.

Step 1: Check your device's screen

1. Make sure that your screen isn't cracked, chipped or damaged.

2. If you have a case or screen protector, take it off.

3. If you're wearing gloves, take them off.

4. If you've put any stickers over the screen or sensors, peel them off.

5. Make sure that your screen is clean.

Step 2: Try these troubleshooting steps

If none of the quick checks above worked, try the troubleshooting steps below.

Restarting your device

To restart your phone or tablet, press your device's Power button for about 30 seconds, until

your device restarts.

Rebooting your device gives it a fresh start. Sometimes, that's all you need to fix an issue.

If your touchscreen is still completely unresponsive after restarting your device, you can find out

how to reset your device to factory settings (below).

See whether an app is causing the problem

The problem may be caused by an app that you downloaded. To see whether a downloaded app

is causing the problem, you can reboot your device in safe mode.

1. Turn on safe mode.

2. Once you're in safe mode, touch the screen.

oIf your screen works in safe mode, a downloaded app is most likely causing

your issue.

1. Restart your device to exit safe mode.

2. To find the app that’s causing issues, uninstall recently downloaded apps

one by one.

3. After you remove the app that's causing the problem, you can re-install the

other apps that you removed.

oIf your screen doesn't work in safe mode, continue to the next section.

Test the affected part of your screen

If the issue happens only sometimes, or only on a specific part of the screen, you can use the

notification shade to confirm. The notification shade is the panel that you can swipe down from

the top of your screen.

1. Touch the top left corner of the screen.

2. Slowly drag your finger to the bottom right corner without lifting. Try to move your

finger slowly enough so that you can count to 10 before reaching the opposite corner of

the screen.

oIf you can drag the notification shade all the way to the bottom of the screen

The problem isn't caused by a specific area on your screen. You can find out how

to reset your device to factory settings (below).

oIf the notification shade releases while you're still dragging your finger

across the screen

Repeat the test. If the notification shade releases again, note whether it happened

in the same place on the screen.

If your device is a Pixel phone, find out how to get help.

For other devices, please contact your device manufacturer.

Turn off developer options

If you have developer options turned on, those developer settings could be affecting your

touchscreen performance.

1. Open your device's Settings app .

2. Under "System", tap Developer options. You'll see this only if you have developer

options turned on.

3. Tap the On/Off switch.

Troubleshoot Wi-Fi network connections

If you're having trouble connecting to Wi-Fi –for example, the Wi-Fi icon on your device's

screen is orange or has an exclamation point –try the solutions below.

After each step, try connecting to the Wi-Fi network again by opening a web page on your

mobile browser.

Note: Android isn't the same on all devices. These instructions are for devices running Android

7.1 and up. Find out how to check your Android version.

Step 1: Check your settings and restart

1. Make sure that Wi-Fi is on for your device. Then turn Wi-Fi off and on again to reconnect.

2. Make sure that Aeroplane mode is off for your device. Then turn Aeroplane mode on and off

again to reconnect.

3. Press your device's Power button for about 30 seconds, until your device

restarts. Restarting gives your device a fresh start. Sometimes, that's all you need to fix an

issue.

Step 2: Check the source of the problem

Device problems

Try connecting to the Wi-Fi network with another device, such as a laptop computer or a friend's

phone. If other devices can use the network, the problem is most likely specific to your device.

Network problems

Check whether your device can connect to another Wi-Fi network, such as at a friend's house or

a public network. If your device can connect elsewhere, the problem is most likely specific to the

network.

Internet problems

If your device connects to the network but doesn't access the Internet, the problem is most

likely specific to your Internet connection.

Step 3: Troubleshoot based on your problem type

Troubleshoot device problems

Check your network password

Check that your device is using the right network password.

1. Open your device’s Settings app .

2. Tap Wi-Fi the network name.

3. To see the password, tap Show password.

Delete and re-add the Wi-Fi network to your device

Delete a Wi-Fi network from your device

1. Open your device’s Settings app .

2. Tap Wi-Fi.

3. At the top, make sure that the Wi-Fi switch is On.

4. In the list, tap the name of a saved network.

Tip: On Android 6.0 and below, to see Saved networks, tap More .

5. Tap Forget.

Add the Wi-Fi network again

1. Open your device’s Settings app .

2. Tap Wi-Fi.

3. At the end of the list, tap Add network.

Tip: On Android 6.0 and below, to see Add network, tap More .

4. Enter the network name (SSID) and other security details, if needed.

5. Tap Save.

6. You may need to enter a password to connect.

See whether an app is causing the problem

The problem may be caused by an app that you downloaded. You can restart your device in safe

mode to determine whether a downloaded app is causing the problem.

1. Turn on safe mode.

2. Once you're in safe mode, try connecting to the Wi-Fi network again.

1. Open your device's Settings app Wi-Fi.

2. Tap the network's name.

3. See whether the Wi-Fi connection works in safe mode.

oIf the Wi-Fi connection works in safe mode

an installed app is most likely causing the issue.

1. Restart your device to exit safe mode.

2. Uninstall recently downloaded apps one by one. See whether the connection

works.

3. After you remove the app that's causing the problem, you can re-install the

other apps that you removed.

oIf the Wi-Fi connection doesn't work in safe mode

There's most likely a problem with the Wi-Fi network or Internet connection.

Troubleshoot network and Internet problems

Restart the Wi-Fi router and modem

If you have access to the router or modem, try turning it off and then on again.

1. Unplug the router and modem's power cords from the power outlet for 15 seconds.

2. Plug the power cords back in.

3. Check that all cords and cables are secure at both ends.

4. The router and modem should turn on automatically.

5. Wait a few minutes, until all the lights on the modem and router are working as intended.

If the lights on the router or modem aren't flashing as intended according to the manufacturer or

manual, there may be an issue with the modem, router or Internet connection.

Contact the network administrator or your Internet Service Provider to see if they can resolve

this issue. For example, there might be a service outage or they might need to reset your Internet

connection.

To connect to a public network, sign in

Public networks, for example at cafes or aeroports, often have a log in or authentication page that

you must complete in order to use that network. If you don't sign in or accept the terms on that

page, the public Internet connection won't work.

If you see an authentication page on your device, sign in or accept the terms to get on

that network.

If you don't see this page after you connect to the public network:

To check for a notification that asks you to sign in to the Wi-Fi network, swipe down from the

top of your device's screen.

To see whether the authentication page will come up, open a new browser window and try to

load a website.

If that doesn't work, try re-establishing your connection to the network:

1. Open your device’s Settings app .

2. Tap Wi-Fi.

3. Tap the name of the network. Then tap Forget.

4. At the top of the screen, tap to switch Wi-Fi Off. Then tap again to switch it back On.

5. On the list, tap the network name.

6. You should get a notification to sign in to the network. To bring up the authentication page on

your device, tap the notification.

7. To connect to the network, accept the terms.

Reset all network settings

To reset all your network settings:

1. Open your device’s Settings app .

2. Under "Wireless & networks", tap More.

3. Tap Network settings reset.

4. At the bottom, tap Reset settings.

Troubleshoot creating a Wi-Fi hotspot

Make sure that "Portable Wi-Fi hotspot" is on

1. Open your device’s Settings app .

2. Under "Wireless & networks", tap More Tethering & portable hotspot.

3. Tap Portable Wi-Fi hotspot to switch it on.

oIf it was already on, switch it off and then on again.

oIf your device has never before had a portable hotspot, first tap Set up Wi-Fi hotspot.

You can find out more about tethering with Wi-Fi hotspots, Bluetooth or USB.

Contact your mobile operator

Not all mobile service providers support mobile hotspots.

If you have issues, check with your operator to see whether your device can connect to mobile

hotspots and whether they're in your data plan.

When you reconnect

When you reconnect, check for the latest system update. Updates may bring improvements that

can help fix device issues.

You can also find out how to change your advanced Wi-Fi settings.

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