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Fixing the Huawei MateView 28" display black screen failure

Last updated: 18 August 2025 at 16:18:35 UTC

This information is mostly a copy of u/bozma88's post on Reddit. Without their amazing research into the issue, and solution sharing, my monitor would still be a lemon. This post is for me to refer back to later, with added further detail for disassembly (I have 2 of these monitors). Any questions should be asked in that thread, I am an amateur!

This guide involves disassembling electronic equipment and working with delicate components. This is not an official repair method and doing so may void your warranty. You perform these steps at your own risk.

If you're here, your Huawei MateView 28" is probably turning on, and then a short time later turning off again. Or perhaps your monitor is longer turning on at all. Thanks to u/bozma88, we can repair it!

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Table of Contents

What is the issue?

A Varistor is like a fuse that opens a circuit when it overheats. This is a thermal scan of the damaged component: you see it suddenly tripping when you increase brightness!

It's an engineering error: The high temperature of the internals of the casing makes it work above its rated temperature, and over time it breaks.

Gaining access

Before proceeding, ensure that the monitor is entirely unplugged!
  1. At the top of monitor stand, carefully remove the plastic cover. There are 6 clips, 2 on each size, and 1 on each end. (Image 1 & 2)
  2. You should see 4 screws. Remove all of them. Don't worry about keeping track of which screws are used where, the 2 larger screws here are the only ones that differ from the rest. (Image 1 & 2)
  3. Before sliding the outer housing off, we'll need to remove the power button. This is a simple magnet. Use a piece of tape to pull it out. (Image 3)

Once this is done, you'll be able to slide the outer housing up and off of the monitor. (Image 4)

Be gentle removing the top cover! If you're too rough, you'll snap some clips like I did (image below) 🤦🏻‍♂️
Images

Disconnecting the boards

Removing the wireless board

Assuming everything went correctly, you should now have some access to the board that you need to meddle with. Before that though, we'll need to continue disassembling and disconnecting parts. You should see a wireless board mounted onto the main board.

The ribbon cables are very delicate, so be careful when disconnecting them
  1. Disconnect the power ribbon. It's held down with a hinged latch on the right-hand side. Use a spudger to pull it up, and use tweezers to gently pull out the ribbon. (Image 1, circled in Blue)
  2. Now you can remove the 4 screws. (Image 1, circled in Pink) DON'T PULL THE BOARD AWAY YET!
  3. Behind the wireless board, you'll see the the video cable connection (Image 2). Use tweezers to pull back the tape. You should see a another hinged latch. Release the latch and gently pull out the connector.

You can now pull away the board, and lay it down on your surface. Be careful with the white & black cables that are still connected to it.

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Disconnecting the main board

Now we can start disconnecting the main board. Don't go mad here, we only need to dismantle the bare minimum to remove the board from the monitor stand.

  1. Disconnect the power ribbon. This is exactly the same process as on the wireless board. (Image 1, circled in Yellow)
  2. Disconnect the audio cable. There's no latch, so gently use a spudger to ease the conenction out. (Image 1, circled in Blue)
  3. There's another video cable! Remove this in the same way as we did on the wireless board. (Image 1, circled in White)
  4. Remove the USB/audio interface connectors. There ard 3 clamps to remove. 1 small, 2 large. Each one rests on a metal hook. Be careful that you don't lose them as you unscrew! (Image 1, circled in Pink)
  5. Now look to the top of the board. Cable 1 (left) has 2 grey tabs. Push those in, and then use a spudger to release the cable. You should be placing your spudger between the 2 larger metal pieces. (Image 2, circled in Yellow)
  6. Cable 2 (right) has a plastic housing covering it. Remove that, And then use a spudge to ease the cable out. (Image 2, circled in Pink)
  7. There are 6 screws holding the board in place. Remove those. DON'T PULL THE BOARD AWAY YET!
  8. Behind the wireless board, you'll see the the video cable connection. Use tweezers to pull back the tape. You should see a another hinged latch. Release the latch and gently pull out the connector.

You should now be able to remove the board from the stand!

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Replacing the component

Take your time here. These parts are small and easily damaged.

Time to crack out your soldering iron.

  1. Look for the component labelled "X2". This is what you'll need to remove. (Image 1)
  2. Using a two-tipped soldering iron or 2 soldering irons, remove the component. Make sure that the pads are totally clean. (Image 2)
  3. Install your new MLV. Carefully apply a small amount of fresh solder to one pad, then place the new component on the pads. Solder the first pad, then solder the second pad to ensure a secure connection. Make sure that it sits as flat as possible.
  4. Secure the new component with a small piece of Kapton tape to prevent it from shorting against the metal casing once the monitor is reassembled. (Image 3)
Struggling a little with removing the component? Try a little flux.
Use desoldering braid or a solder sucker to remove any excess solder from the pads. Then, use a cotton swab and high-purity isopropyl alcohol to clean the area thoroughly. The pads should be totally clear.
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Reassembly

Follow the disassembly steps in reverse.

  1. Ensure all ribbon connections are seated correctly
  2. Ensure all latches are secured

Reconnect your cables and turn your monitor back on. If everything went smoothly, you should have picture and sound. Enjoy!