Greetings all. This is my first post in the forum, but I am desperately in need of help.
I work in a repair shop and we recently took in a Dell inspiron 15r 5520 with a cracked screen. Ordered and installed a replacement, and turns out, the back light did not function. Upon troubleshooting, the backlight in the old, broken LCD is also now burnt out (It worked before), leading me to believe that there is another problem at play. These screens do not have invertors, and upon doing some googling, I discovered some dells have fuses located on the motherboard that protect the backlight circuit for the LCD. After extensive research, I cannot locate this fuse or determine any other cause for the LCDs' backlights being non-functional.
Thanks in advance. I would just replace the board, but I don't have $180 to replace a part I probably befuddled. I am relatively sure the cable to the lcd was plugged in with the battery in, or the ac jack plugged in.
Also, the LCD cable is intact. Any help is appreciated. Attached are screenshots of the board near the lcd cable connector and a link to the motherboard schematic.