How to replace the base film of LCD screen

How to replace the base film of LCD screen?
1. After receiving the back bottom film, tear off the original bottom film and clean the glue on the glass.
2. Test whether it contains the upper film. By rotating the bottom film, you can see that black and white colors alternate, then this one contains the top polarizing film, which is normal.
3. Cut the new base film to match the glass size.
4. Tear off the protective film on the bottom film and paste it on the glass with the glue side. (The glue side is attached to the glass)
Attention:
If there is no display after installation, please check whether the bottom film is pasted upside down or the LCD glass is damaged.
This bottom film is only used for the bottom, not the top polarizing film. Please do not remove the top polarizing film after receiving the goods.
It is recommended that people with professional knowledge use it.