If you are actually trying to repair the motherboard you are correct. Without the proper tools and training they are almost impossible to repair, and Dell will not and has never released MB schematics. I have never seen a qualified tech ever repair the board. Much easier and more reliable to replace.
-Forum Member since 2016 -I do not work for Dell -A user helping other users -If you like an answer please click on thumbs up -If a reply is a solution to your problem please click on Accept as Solution Gaming on a home built ASUS B450-F Gaming with Ryzen 5 2600X Real work on an Inspiron 15 5575 and Latitude E5430