My screen is trembling

@gharbimahran the very first thing I would do, is to replace the screen. It is possible that it has failed. While replacing it, check the motherboard for any component that might be missing or looks damaged etc. You also want to check the connector and ribbon cables. Make sure there are no bend pins or tears.

There is always a possibility that this is caused by bad capacitors etc. but for that you would need the board schematics and component layout. Start with the screen.

Since iFixit does not yet have a guide for this repair, use something like this video to guide you.

While you work on your screen, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!