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Troubleshooting

Super73 MZFT: display shows two white lines and two green lines and seems frozen

On a Super73 MZFT, a display showing two white and two green horizontal lines and not responding is usually in Bluetooth mode, often from holding the down button at power on. Restart without touching the button.

Last edited Nov 9, 2026 by Pedalwise team Edit History Add a subpage

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You turn on your Super73 MZFT and the display shows two horizontal white lines and two horizontal green lines. The buttons seem to do nothing and it looks frozen. This usually means the display has gone into Bluetooth mode, and the display is not necessarily damaged (Super73 MZFT display article). Short answer: turn the bike off, wait a few seconds, and turn it back on without holding the down button.

Most likely cause

Holding the down button while the bike powers on puts the MZFT display into Bluetooth mode, and this often happens by accident at startup (Super73 MZFT display article). Bluetooth mode is not a riding feature, which is why the normal ride screen is gone and the display seems unresponsive. Nothing is broken in this case. The display is just waiting in a different mode.

Other causes to rule out

If a restart doesn't bring back the normal screen, do the general checks below before contacting Super73 support (Super73 initial troubleshooting):

  • Loose or damaged connections between the battery, controller, main wiring harness and display.
  • Firmware that needs updating in the Super73 app.
  • A magnetic phone mount near the display, which can interfere with it.
  • A low battery. Charge to 100% and check again.

For cases where a part has actually failed, there are MZFT display and MZFT controller replacement guides in Super73's troubleshooting section (Super73 troubleshooting guides).

How to confirm

  1. Turn the bike off.
  2. Wait a few seconds.
  3. Turn it back on, keeping your fingers off the down button the whole time (Super73 MZFT display article).
  4. If the normal screen returns, you're done. Make a habit of not resting a thumb on the buttons as you switch on.
  5. If the lines are still there, take a photo or short video of the display and note what you were doing just before it started. Super73 customer care needs these.
  6. Remove any magnetic phone mount and charge the battery fully, then try again (Super73 initial troubleshooting).

Fix options

Restart without the down button (easy)

Free, and the fix for this exact screen. Takes under a minute.

Update firmware in the app (easy)

Connect in the app and install any pending updates, shown by a yellow triangle, as part of initial troubleshooting (Super73 initial troubleshooting). See update e-bike firmware.

Replace the display (moderate, after support confirms)

Only if Super73 support confirms a display fault. Follow the MZFT display replacement guide (Super73 troubleshooting guides), and Super73's support hub links a replacement parts store (Super73 support). Don't buy a display until support has seen your photo or video, because the usual cause here needs no parts.

Parts

  • E-bike display (only if support confirms a fault)

When to get a pro

If the display stays stuck after a clean restart, a firmware update and a full charge, send Super73 your photo or video and the steps you tried, or take it to a Super73 service center listed on its support hub. See also display blank or flickering and Super73 troubleshooting.

Sources

Stuck after these checks? Find a shop near you.

Need a pro?

If these steps didn't fix it, find a shop near you in our partner network of shops that work on electric rides.

Talk

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