Cisco Meraki MC74-HW USB and Headphone Jack Inputs Board Replacement

Written By: Jeremy Chdid

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Cisco Meraki MC74-HW USB and Headphone Jack Inputs Board Replacement

Difficulty

Difficult

Steps

Time Required

25 minutes

Introduction

If the USB or headphone input is not working in your Cisco Meraki MC74-HW, use this guide to replace them. Here are the steps to fix the problem with a simple change of the inputs board. Once the back cover is fully detached from the device, a J00 screw bit and reverse tweezers are needed to replace the board.

Tools

Step 1

Extend the stand as far away as possible from the device.
Remove all four 3 mm Hex 2 screws from the stand.
A bit with a flexible extension may be needed to remove these screws.

Step 2

Lift the stand off the device.

Step 3

Insert a plastic spudger between the back housing cover and the sensor cover piece.
Work your way slowly around the edges of the device until all the clips have been unclipped.
Do not insert any tool recklessly into the device or you might damage wires and connections.

Step 4

Separate the back housing cover from the device completely.

Step 5

Disconnect the ribbon cable on the board using a pair of reverse tweezers.
Electronic ribbons are very fragile, so pull slowly to disconnect them.

Step 6

Remove the three 2 mm screws holding the USB and headphone jack inputs board using a JIS #00 screwdriver.
Carefully lift the board until you have clear access to the electronic connector.