1st Method: Charge your device up to 45-60 minutes. Put your Huawei P20 Pro and P20 on charging and wait until 45-60 minutes. And after that remove charging and try to switch on your device. 2nd Method: Remove SIM card & memory card. Because of faulted memory card or damage SIM card, your Huawei P20 Pro won’t turn on or black screen issue

How To Fix Huawei P20 Lite Black Screen of Death Issue Fully charge the phone battery. One of the main causes as to why the phone screen will not work or why the phone does Perform a soft reset. The best thing you will need to do is to refresh the phone software by doing a soft reset. Start the Replacement Touch Screen Digitizer and LCD Screen for Huawei P20 Lite Screen Replacement; Replace the old, broken, cracked and damaged one. Repair will make your valued device look new, fresh and more refreshing than ever. Replacement Parts and of highest quality supplied by OEM and are guaranteed to completely fit and work.
Update Huawei PC Manager and the fingerprint driver to their latest versions. Update Huawei PC Manager to the latest version. For details, see Updating PC Manager to the latest version. To update the fingerprint driver, go to Huawei PC Manager > Optimization > Drivers > Check for updates, select all items to be updated, and click UPDATE. After
Check whether your device uses a folio cover. If the magnet specifications of the folio cover do not match the product, the screen may automatically turn off or turn to black due to incorrect identification. Open Settings, search for Smart Cover, and select Off.

STEP 7 Press and hold the power button and volume down, don't let go, your screen will go blank, once it turns back on, release the power key but continue holding vol down, a white screen should appear, you can now release the power volume key, you are now in fastboot mode and can input commands.

The phone was working fine at the time and I could have used it normally, just no charging. Today I finally got it, switched it, tried to turn it on and it wasn't turning on. I put it to charge, expecting my battery to be just empty, and I see the red LED blinking and the screen wasn't turning on at all.
What I found was the solution was to go to Settings -> System & Updates -> System Navigation -> Enable "Off-screen navigation key". 1. Firm-Emphasis8171. • 2 yr. ago. I fixed this by deleting face recognition and restarting phone and home and fingerprint came back. r/Huawei.
OK. This is how I got my P20 Pro to work. - I used a generic USB-C to HDMI Adapter. Mine was the Baseus UCN3277. - Screen Broke completely - Touch not working - Fingerprint not working I just used a wired cheap HP USB Keyboard connected to the USB-Adapter. Using a wired Mouse made it not work for me. I think this draws to much power. sfdE.
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  • huawei p20 lite screen not working