No boot, no fan spin, but CPU heatsink is warm.

Hello, I'm looking for some diagnostic help. I have a Dell Inspiron 15 7579 which randomly shut off and is now completely unresponsive. Inside looks clean and I see no signs of water damage. I have replaced the battery and after doing so, the charging light illuminates, but it will not boot. I did notice that even though it doesn't boot, the GPU/CPU die does get warm while charging. Any suggestion regarding where to look next would be appreciated. The charging port seems to be functional, based on the illumination of the charging light. I don't have enough experience with logic board repairs to be able to identify an individual motherboard components which may be malfunctioning.