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Motorola G30 screen replacement

Introduction

Guide to replace a broken screen on Moto G30 phones. On this model, the label on the back says "Type: MC391".

What you need

  1. Motorola G30 screen replacement, Remove SIM card: step 1, image 1 of 1

    • Remove the SIM card tray with a pin or a small pointy object

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  2. Motorola G30 screen replacement, Unclip the back cover: step 2, image 1 of 1

    • Unclip the plastic back cover using any tool you like (mediators, sprudgers, Jimmy...)

    • Be careful not to lift the cover too far from the phone, it has to be lifted cautiously because a cable is attached to it

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  3. Motorola G30 screen replacement, Unscrew the optical cover part: step 3, image 1 of 2 Motorola G30 screen replacement, Unscrew the optical cover part: step 3, image 2 of 2

    • Slighly move the back cover in order to unscrew the plastic piece behind it

    • Remove the 9 small Philips-head screws inside

    • You will also have to remove small black adhesive pieces to be able to remove the part completely

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  4. Motorola G30 screen replacement, Free the back panel: step 4, image 1 of 1

    • Once the black plastic cover piece is removed, unplug the cable holding the back panel

    • Once this flex cable unplugged, lift the back panel completely

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  5. Motorola G30 screen replacement, Unplug battery and screen: step 5, image 1 of 1

    • Unplug both battery and display connectors

    • Battery on the right

    • Display in the middle

    • You can use the opening tool as lever.

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  6. Motorola G30 screen replacement, Unglue the battery: step 6, image 1 of 1

    • Very carefully unglue the battery

    • Adhesive is quite strong here, and the battery is not very rigid, so this is a complicated operation. It would be dangerous to head the battery cell, be patient and careful.

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  7. Motorola G30 screen replacement, Disconnect the bottom PCB: step 7, image 1 of 1

    • Unscrew the cover at the bottom of the phone

    • 7 small Philips head screws to remove

    • A little black adhesive to peel off around the edges

    • Unplug the connector

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  8. Motorola G30 screen replacement, Unglue display cable: step 8, image 1 of 1

    • Detach the display flex cable from the back of the chassis

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  10. Motorola G30 screen replacement, Remove the screen: step 9, image 1 of 3 Motorola G30 screen replacement, Remove the screen: step 9, image 2 of 3 Motorola G30 screen replacement, Remove the screen: step 9, image 3 of 3

    • Steps 9 and 10 are only useful if you order the display without its frame. Move on to step 11 if you intend to order the display with its frame

    • Heat up to help unglue the screen

    • Battery has to be removed first, heating batteries is dangerous

    • Unglue the display from the chassis

    • I could not properly unglue with a cutter blade on the side. My technique is simpler and more brutal: I pushed the display away from the connector hole, with a rigid tool.

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  11. Motorola G30 screen replacement, Clean up the frame: step 10, image 1 of 1

    • Remove the glass shards still glued around the frame

    • Put some gloves on, because glass shards are dangerous!

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  12. Motorola G30 screen replacement, Optional: test phone: step 11, image 1 of 2 Motorola G30 screen replacement, Optional: test phone: step 11, image 2 of 2

    • Replug the battery pack

    • Test the battery voltage on the test point to the left of the connector (the ground is everywhere on the metal chassis): it must be between 3.6 and 4.2 V

    • You can also test the motherboard with a Linux-based computer

    • Unglue the screen-USB-motherboard flex cable from your broken screen, and replug the bottom USB board with the top motherboard

    • Turn on phone with Power On + Up buttons

    • Plug it to the computer with an USB-C cable

    • Type "lsusb" in a shell

    • If you can read something like "22b8:XXXX Motorola PCS moto g(30)", congratulations: your motherboard still lives

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  13. Motorola G30 screen replacement, Order replacement screen: step 12, image 1 of 2 Motorola G30 screen replacement, Order replacement screen: step 12, image 2 of 2

    • Once your phone has been successfully torn down and tested, it is time to order the replacement screen

    • The part will cost you around 15-20€. You can find it here for instance

    • Two choices: ordering the display pre-assembled on a new frame, or ordering it without

    • I recommend pre-assembled display, it will be more sturdy and less subject to breaking

    • While waiting for your order, don’t forget to store your parts and small screw properly

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  14. Motorola G30 screen replacement, Screen with frame: step 13, image 1 of 1

    • If you ordered the display pre-assembled on a frame, you will have to move all the components from the old chassis to the new one

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  15. Motorola G30 screen replacement, Move the buttons: step 14, image 1 of 3 Motorola G30 screen replacement, Move the buttons: step 14, image 2 of 3 Motorola G30 screen replacement, Move the buttons: step 14, image 3 of 3

    • You will find the small button panel on the chassis side, unglue it carefully

    • Start by ungluing the black tape covering it

    • Unplug the button connector from the main PCB

    • Unglue the button flex board carefully

    • Glue it on the new chassis

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  16. Motorola G30 screen replacement, Unscrew PCB from frame: step 15, image 1 of 2 Motorola G30 screen replacement, Unscrew PCB from frame: step 15, image 2 of 2

    • Unscrew both PCB

    • The top one is held by 2 screws

    • The bottom one is help by one screw

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  17. Motorola G30 screen replacement, Move top items: step 16, image 1 of 3 Motorola G30 screen replacement, Move top items: step 16, image 2 of 3 Motorola G30 screen replacement, Move top items: step 16, image 3 of 3

    • Slide the top PCB out of the chassis

    • Under it, there is a small undefined module, and an opaque sticker

    • Get the module out of its casing

    • Unglue the sticker under it

    • Replace both module and sticker on the other side

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  18. Motorola G30 screen replacement, Unglue the haptic module: step 17, image 1 of 2 Motorola G30 screen replacement, Unglue the haptic module: step 17, image 2 of 2

    • Remove the bottom PCB

    • The haptic module is under it, unglue it carefully

    • Start by the connector side

    • Once the connector side is lifted, it is easier to get to the rest of the module and unglue it

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  19. Motorola G30 screen replacement, Salvage the stickers or replace them: step 18, image 1 of 1

    • Try to salvage the stickers and glue them back to the new frame

    • You can also use new stickers

    • The pink sticker is a very thin thermal pad, you can replace it by thermal paste

    • The orange sticker is a tape copper foil

    • I don’t know how to replace the metallic grey thing, it is probably use for a better RF shielding

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  20. Motorola G30 screen replacement, Insert the top PCB: step 19, image 1 of 2 Motorola G30 screen replacement, Insert the top PCB: step 19, image 2 of 2

    • Insert the top PCB into the new frame

    • Don’t forget to move the button PCB small connector out of the way, it could get stuck under the board

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  21. Motorola G30 screen replacement, Plug the elements back: step 20, image 1 of 1

    • Plug the elements back

    • Top and bottom screen module connectors

    • Right-side antenna cable

    • Small button PCB connector

    • Screw the boards back in place

    Translate

  22. Motorola G30 screen replacement, Rescrew covers: step 21, image 1 of 2 Motorola G30 screen replacement, Rescrew covers: step 21, image 2 of 2

    • Replug the back cover connector

    • A step you don’t see on the pictures because I forgot

    • Rescrew the two PCB covers

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  23. Motorola G30 screen replacement, Clip the cover back into place: step 22, image 1 of 1

    • Clip the cover back in place

    • Insert the SIM card holder

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Conclusion

Unfortunately, my phone is bricked, so I could never turn it on and test the new screen. I hope you will get more luck than me!

Special thanks to these translators:

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Eve Redero

Member since: 02/28/22

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