SOLVED: After change LCD, rear camera and flash stop working

Hi,

after turning on the phone, the rear camera showed a black screen and had white lines on the bottom of the app(white and purple blemishes), but the flash worked.

After a second reboot of the iPhone and some other attempts, also flash has stopped working and the background of the camera app was completely black.

I read I need to replace the camera but then I want to know if the flash will work normally or need to do some other repair after that.

Thank you