Looking for Logicboard Schematics to locate F4400 and F8100
Looking for schematics of the logic board of a 2017 27” iMac. Symptoms are black screen at start up and fan at full speed. 4 (rather 3.5) out of 5 diagnostic LEDs are lid but there is 0 signal from the LCD. I am trying to see if i have failed fuses F4400 or F8100 as of the Technician Service Manual. But i cant really exactly make out which components are the right ones. Schematics would help me a lot here.