The joycon does not charge, the fan does not work, the Nvidia heats up

Hello, I have the following problem. Nintendo Switch V1, the USB was broken, I replaced it. When charging is connected, the console consumes 1.5 ah, it charges normally in standby mode, but if you turn it on and try to use it, almost the entire board begins to heat up very much - the processor and everything to the left of it. Where should you look? The processor was reworked, the same problem.