Hi guys.

I have an old Letv le max 2 phone.

After several years of use, wasn't necessary anymore so was in the drawer. I started using it again as a second phone with a custom rom inside. But the problem is one day shutdown because i forgot to charge it , after powering up was opening only in fastboot mode. After many attempts the screen went completely dark. So i put it again in the drawer. I tested it again after 4 months and maybe the battery was drained and when i plugged it in again opened in fastboot mode( screen was working) but after many tries to go in recovery or normal power the screen went again completely dark.

Do you know what can be wrong? How can i fix it? (Also i have opened it up to have access in the battery and the other components)