Blu Grand M Motherboard Replacement

Введение

Follow this guide to replace the motherboard on your BLU Grand M. If your phone has been submerged in water and fails to turn on, the motherboard may be damaged and will need to be replaced. If your phone fails to charge, even after replacing the battery, replacing the motherboard may also help. Be sure to power off your phone prior to beginning the project.

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Шаг 1 Battery

Blu Grand M Motherboard Replacement, Battery: шаг 1, изображение 1 из 2

Blu Grand M Motherboard Replacement, Battery: шаг 1, изображение 2 из 2

Remove the two plastic plates with a plastic opening tool.

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Шаг 2

Using a Phillips #000 screwdriver, remove the 3mm screws. Be sure to do this for the top and bottom of the phone.

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Шаг 3

Blu Grand M Motherboard Replacement: шаг 3, изображение 3 из 3

Remove SIM card tray with paperclip or SIM card tray removal tool.
Push down on the phone beside the camera and up on the backplate with your thumbs to remove the back plate. Remove adhesive if necessary.

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Шаг 4

There is a patch of adhesive underneath the battery, which can make it difficult to remove.
Place the plastic opening tool in the highlighted indent, and push up on the battery to remove it.

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Шаг 5 Plastic Plate

Blu Grand M Motherboard Replacement, Plastic Plate: шаг 5, изображение 1 из 2

Blu Grand M Motherboard Replacement, Plastic Plate: шаг 5, изображение 2 из 2

Remove the yellow plastic tape using a pair of tweezers.

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Шаг 6

Blu Grand M Motherboard Replacement: шаг 6, изображение 3 из 3

Use a Phillips #000 screwdriver to remove two black 4.0mm screws.
Use a Phillips #000 screwdriver to remove 2 silver 4.0mm screws
Remove the plastic cover along the top by tugging on it on the corner as shown.

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Шаг 7 Motherboard

Blu Grand M Motherboard Replacement, Motherboard: шаг 7, изображение 1 из 2

Blu Grand M Motherboard Replacement, Motherboard: шаг 7, изображение 2 из 2

Place a spudger or other tool underneath the black wire.
Lift up on the gold coaxial cable connector so it disconnects from the motherboard.

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Шаг 8

Blu Grand M Motherboard Replacement: шаг 8, изображение 3 из 3

Using the the narrow tip of a nylon spudger, open the two cable connector ports.

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Шаг 9

Insert the spudger underneath the ribbon cable.
Pull the ribbon cable away from the gray connector.
The cable should pull away free from the gray connector without any resistance.
If you encounter resistance, check to see that the black cable connector port is open.

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Шаг 10

Remove the four 4.0mm screws with a Philips #000 screwdriver.

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Шаг 11

Lift the motherboard up and slightly away from the smartphone frame using the nylon tipped tweezers or other ESD safe tool.
The motherboard is still connected to the frame via a large black ribbon cable. Do not lift higher than this ribbon allows.
Flip the motherboard upside down to reveal the ribbon cable connector.

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Шаг 12

A large black ribbon cable is connected to the underside of the motherboard.
Use the spudger to open the orange plastic ribbon connector.

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Шаг 13

Insert the spudger into the folded ribbon cable loop.
Pull the ribbon cable away from the black plastic connector.
The ribbon cable should pull away from the black connector without any resistance.

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Шаг 14

Remove the motherboard with the nylon tweezers.
Place the motherboard on an electrostatic discharge (ESD) safe material.

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Заключение

To reassemble your, follow these instructions in reverse order.

Note: The ribbon clamp connector, also known as a Zero Insertion Force (ZIF) connector, might be difficult to reinsert. Follow the reinstallation step at the end of this guide: Recognizing & Disconnecting Cable Connectors.