Phone isn't turning on after replacing battery and charging board.

I replaced the battery because of the swelling. And I also replaced the charging board because the USB-C connector seemed loose. However, after this, when I press the power button or connect the charging cable, only a vibration occurs for about 1 second and nothing appears on the screen, so I need help.

Below are the things I did.

- Even before I unplugged the connector of the old battery, the screen showed 0% battery when I pressed the power button.

- Since it was not working properly, I tried reconnecting the old battery with the swelling or replacing it with the old charging board, but the problem was not solved.

- I tried a forced reboot (VOLUME UP + POWER button) through YouTube or the Internet community, and tried unplugging all connector in phone -> connecting all connectors except battery connector -> connecting the battery connector at the end, but the problem was not solved.