This is a Mi 9SE phone.The top of the screen was damaged by overheat.
You can also see it when the screen is on.
Turn off the phone.
Remove the card slot.
Use the heat gun or hair dryer to heat
the edge of the back cover.
Use a suction cup to open a gap between the phone and
back cover, and insert the pick to open the gap slowly
Be patient and careful.
Overforce may damage the back cover.
If you feel difficult to operate,
reheat the edge of the back cover and have a try.
Remove the back cover from the phone.
Take down the screws on the motherboard
and subboard.We marked with red.
Some mobile phone screws are of different sizes.
If you don't have specialized tools or don't want to
separate the screws for each position,
you can fix the screws with foam blocks as we do.
Remove the motherboard cover.
Disconnect the subboard flex cable,
screen flex cable and battery flex cable.
Take down the two screws from the motherboard.
Disconnect the microphone flex cable.
Disconnect signal cable.
Use the spudger to pry up the
motherboard and slowly take it out.
Pay attention to the microphone to
avoid scratched by the motherboard.
Remove the 8 screws at the bottom.
Remove the speaker module.
Take down the screws from the subboard.
Disconnect and remove the signal cable.
Disconnect the flex cable on the subboard.
Use the spudger to pry up the subboard and take it out.
Gently pull down the battery sticker with a tweezer.
If the sticker breaks,
use a hot air gun or hair dryer to remove the battery.
Remove the connection flex cable
between motherboard and subboard.
Heat and remove the vibrator.
Remove the fingerprint module.
Remove the earpiece speaker
Remove the microphone
Now it has been completely disassembled.
This is a new screen.
Now let's have a test.
We put the motherboard back.
Connect the screen to the battery flex cable.
Press on the motherboard to make the
motherboard connect to the FPC of the button.
Then boot up the phone.
Dial *#*#6484#*#* to enter project mode.
Choose Touch Sensor to test the screen function.
Test the display.
Make sure there are no bugs like bad spots.
No problem has been found. Now we can turn it off.
Now let's take down the battery and motherboard.
Remove all protective film from the screen.
Install the earpiece speaker.
Install the fingerprint module and subboard,
then lock the screws.
Put the microphone onto the motherboard.
Install the motherboard onto the screen
and fix the microphone in place.
Fix the two screws on the motherboard,
then install the signal cable,
connection flex cable between motherboard
and subboard,
and the battery.
Install speaker assembly and fix with screws.
Install the flex cable on the motherboard,
then use screws to fix the motherboard cover.
The back cover can be covered directly
if it still remians sticky,
otherwise we need to be fixed with glue.
Press it to reinforce.
install the card slot.
Reinforce the back cover again with a rubber band
Let it place for a few hours
then you can remove the rubber band.
Finally, screen replacement completed.
