HUAWEI P9 standby/volume control cable repair guide

You can’t adjust the volume or turn on your device.

In this guide, we show you how to replace your P9’s defective standby/volume control cable on your own. You need this repair if the volume rocker switch isn’t working or has no pressure point. You also need to replace this part if you can’t turn on your device.

Required tools

For storing screws

For storing screws

We recommend storing your screws so you don’t mix up the various screws and small parts.
from €10.99 on Amazon
Tweezers

Tweezers

We recommend using tweezers to remove screws and various small parts from your device.
on Amazon
Pick Set

Pick Set

You need a flat but stable tool such as a pick to pry out parts that are glued in place.
from €14.99 on Amazon
Steel Laboratory Spatula

Steel Laboratory Spatula

You need a flat and sturdy prying tool to disconnect glued parts.
on Amazon
Pentalobe PL1 screwdriver

Pentalobe PL1 screwdriver

You need the right screwdriver for removing pentalobe PL1 screws.
on Amazon
Phillips PH00 screwdriver

Phillips PH00 screwdriver

You need the right screwdriver for removing PH00 screws.
from €10.84 on Amazon

Required replacement part

Huawei P9 Standby-Volume-Control-Cable

Huawei P9 Standby-Volume-Control-Cable

on Amazon

Show all replacement parts for the P9

Steps

11 Steps

Switching off your device

Step 1

Removing the SIM card tray

Step 2

Removing the enclosure screws

Step 3

Lifting the display

Step 4

Disconnecting the battery contact

Step 5

Removing the control buttons

Step 6

Installing the control buttons

Step 7

Connecting the battery contact

Step 8

Installing the display

Step 9

Fastening the enclosure screws

Step 10

Installing the SIM card tray

Step 11

Getting started with the repair of your P9

If you get stuck or have questions, you can post a comment. We’d be happy to help.

11 steps

Switching off your device
Switch off your device. Press and hold the power button until a menu appears. Select “Power off” and tap again to confirm.
Removing the SIM card tray
Insert your SIM tool into the little opening on the tray to unlock the tray.

Remove the SIM tray and, if applicable, the SIM and microSD cards.
Removing the enclosure screws
2 × 2,8 mm P1 Pentalob-Schrauben

Unscrew and remove the two screws at the bottom of the device that keep the enclosure closed.
Lifting the display
Put the suction cup as far down on the display as possible, for example where it says “Huawei.” If the glass is too cracked for the suction cup to generate a vacuum, you can cover the display with tape.

Pull on the suction cup while using the pick to push the back cover against the table. As soon as a gap appears between the display and the enclosure, you can carefully insert the pick.

Also move the pick along the edges to disconnect the display on the sides. Continue to pull carefully on the suction cup.

The fingerprint sensor is installed in the back cover. A flexible flat cable connects this sensor to the motherboard. Be careful when you take off the display to avoid damaging the cable or board.

Carefully lift the display. Slowly open the device at the short upper edge like a book. Now you should be able to see the connection cable.

Disconnect the cable from the motherboard by carefully inserting the spudger below the contact and disconnecting it.
Disconnecting the battery contact
2 × 2,5 mm PH00 Phillips-Schraube

Antenna Cable

Disconnect the white antenna cable from the motherboard to uncover the screw below it.

Remove the two screws that hold the plate in place.

Using the tweezers, carefully remove the plate. The plate is hooked onto the motherboard both at the screw holes and in the middle.

Using the spudger, carefully disconnect the battery contact.

Then disconnect the wide flexible flat cable that goes to the lower board from the motherboard.

Removing the control buttons
Disconnect the connection to the motherboard.

The control buttons are glued to the display frame. Insert the steel spatula between the buttons and the frame. Start on one side.

Then continue on the other side.

Remove the buttons.
Installing the control buttons
Put the control buttons back on the frame. The little tabs on the frame will help you with positioning. The tabs have to go through little round holes in the buttons.

Press the buttons on firmly so the glue will stick.

Connect the plug contact to the motherboard.
Connecting the battery contact
2 × 2,5 mm PH00 Phillips-Schrauben

Connect the wide flexible flat cable to the motherboard by gently pressing the contact into the socket until you hear it click into place.

Now reconnect the battery.

Put the plate back on to secure the contacts. The plate has to hook on both at the screw holes and in the middle.

Fasten the plate with the two screws.

Connect the antenna cable to the motherboard.
Installing the display
Put the back cover at the short upper edge of the display and carefully connect the fingerprint sensor’s contact. You have to hear the contact click into place.

Close the device by folding down the back cover and pressing on the display.
Fastening the enclosure screws
2 × 2,8 mm P1 Pentalob-Schrauben

Use the two screws at the lower edge of the enclosure to close the device.
Installing the SIM card tray
Put the SIM tray and any cards back in your device. Make sure the tray is positioned properly.