Hello! I'm sorry to hear about the issue with your Macbook's LCD screen. If the screen has a crack and is not functioning properly, it may need to be replaced. You can bring your Macbook to an authorized Apple service provider or an Apple Store for repair. Alternatively, you can also look for a reputable third-party repair shop that specializes in Macbook repairs.
Replacing the LCD screen of a Macbook is a delicate process that requires expertise and specialized tools. It's important to have it repaired by professionals to ensure the job is done correctly and to avoid causing further damage to your device.
Before bringing your Macbook for repair, make sure to back up your important files and data to prevent any loss during the repair process. If you have AppleCare+ or if your Macbook is still under warranty, the repair may be covered depending on the extent of the damage.
I hope this information helps, and I wish you the best of luck with getting your Macbook's screen fixed!