Disassembly/Repair of the mobile device Xiaomi Redmi Note 14 Pro (Xiaomi Redmi Note 14 Pro 5G 24090RA29G) with each step description and the required set of tools.

⚠️️ Before disassembling, do not forget to turn your phone off.

First of all, as usual, we need to remove the SIM card tray.

We use a special SIM eject tool, insert it into the hole, and push the tray out.

If the tray is difficult to remove, we can additionally use tweezers.

Next, we need to heat up the surface of the back cover to approximately 70 degrees Celsius, or 160 degrees Fahrenheit. For this, we use a heating mat, but you can also use a hair dryer.

After approximately 5–10 minutes, we can move on to removing the back cover.

For this, we use a thin but durable plastic film, carefully insert it into the gap between the back cover and the midframe, and gently slide it along the edge, cutting through the adhesive layer.

As always, we need to be especially careful around the camera area, since the cover is additionally glued there, and we could accidentally touch or damage the camera lenses. 

After that, we need to unscrew the screws in the upper section. For this, we use a 1.5 mm Phillips screwdriver or a Phillips #000 screwdriver.

The screws look identical; however, it’s better to place them on a special surface in a specific order, since screws sometimes do not fit properly when installed into the wrong holes.

After removing the screws, we need to detach the upper cover.

For this, we use a non-metallic tool to avoid short-circuiting anything on the motherboard.

Next, we disconnect the battery connector, also using a non-metallic tool.

ℹ️️ The Xiaomi Redmi Note 14 Pro 5G 24090RA29G uses a BN5V rechargeable battery with a capacity of 5010 mAh.

Now we move to the lower section, where we also need to remove the screws.

These screws look identical as well, but it’s better to keep them separate from the previous ones.

After removing the screws, we need to detach the lower cover.

As always, we need to find the correct spot where we can carefully pry up, lift, and remove the cover.

So, we carefully work along the edge, find the right spot, and detach the cover with the loudspeaker.

After that, we disconnect the interconnect flex cable connector, the coaxial cable connector, and the fingerprint sensor flex cable connector.

Now we need to detach the sub-board.

The sub-board is held in place with a clip. We need to find the correct spot where we can carefully pry it up and disconnect it

. There is no need to use excessive force so that it does not crack.

So, we carefully remove the slightly recessed sub-board.

The sub-board contains the charging port, the microphone, and the SIM card connector on the opposite side.

After that, we move on to the motherboard. Carefully disconnect the cameras.

The cameras may be glued either to the shields on the motherboard or to the display frame.

It is also better to peel off the copper heat-dissipation layer carefully, since we will need it again during reassembly.

We also need to detach the front-facing camera. It is also recommended to preserve the copper heat-dissipation layer. Set the front-facing camera aside.

Now we can disconnect the connectors: the coaxial cable connector, the interconnect flex cable connector, and the display flex cable connectors. You could say that this display uses two flex cables.

After that, we detach the motherboard. Carefully pry it up by the edge and lift it.

On the opposite side, the motherboard may still be held in place by thermal paste.

And finally, we need to remove the battery.

We have two brown pull tabs labeled A and B. The wide pull tab needs to be pulled upward, while the tab in the middle needs to be folded to the side.

So, we pull the wide tab and remove the battery.

Under the battery, there is an adhesive transparent protective layer that protects the interconnect flex cables.

ℹ️️ In the display frame remained: the earpiece speaker, fingerprint sensor, and vibration motor.