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Motherboard replacement EXTEL Open 3K monitor

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  2. Motherboard replacement EXTEL Open 3K monitor

Motherboard replacement EXTEL Open 3K monitor

The monitor won't switch on even though the power supply is correct? The monitor no longer has a wifi connection? Your monitor's motherboard is probably faulty and needs replacing. Before any intervention or maintenance, please switch off all components of your video doorphone and place yourself on a suitable surface to avoid scratching the screen.

This tutorial is applicable for:

Extel - 720330 - Open 3 K
Difficulté : Moderate
Temps nécessaire : 10 minutes
Nombre d’étapes : 4
Mise à jour : April 2025

Materials needed:

plastic spatula, electronic tweezers, Phillips screwdriver, flathead screwdriver

Tutorial steps:

Step 1: Dismantling the monitor

  • Turn the monitor over to gain access to the fixing screws.
  • Unscrew the 6 Phillips screws.
  • Using a plastic spatula, insert it into the lower part of the monitor.
  • Lever up to remove the rear support from the monitor.
  • Please note that the speaker is located on the rear bracket and is connected to the motherboard. Please lift the rear bracket carefully

Step 2: Dismantling the motherboard

  • Remove the speaker connector using small pliers.
  • Do not pull on the wire, as this may damage it.
  • You can now remove the monitor’s rear bracket.
  • Disconnect the microphone using a small pair of pliers
  • Do not pull on the wire, as this may damage it.
  • Slide the plastic spatula under the wifi antenna and lever upwards to disconnect it.
  • Unlock the video panel by pushing back the two latches with a small flathead screwdriver.
  • Slide the plastic spatula under the video tablecloth and remove it.
  • Do the same for the touch screen panel.
  • Unlock the tablecloth by pushing back the two latches with a small flathead screwdriver.
  • Slide the plastic spatula under the tablecloth and remove it.
  • Remove the two Phillips screws holding the motherboard to the chassis.
  • You can now remove the motherboard and replace it.

Step 3: Replacing the motherboard

  • When replacing the motherboard, make sure that the terminal strips are inserted into the slots provided.
  • Refasten the two Phillips screws on the motherboard.
  • Replace the video connection ribbon and the touchscreen ribbon. Don’t forget to push back the locking catches.
  • Replace the microphone connector
  • Replace the Wifi antenna

Step 4: Repositioning the monitor's rear bracket

  • Replace the speaker connector
  • You can now reposition the monitor’s rear support.
  • Don’t forget to tighten the 6 monitor screws.

 

The replacement is complete

 

 

Step 5: Functional testing

  • Test short-range operation before final reinstallation.
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