AI 9 HX 370 two red lights?

Hi, I recently bought the AI 9 HX 370 mainboard for my DIY edition. I have a 2021 model with the original battery et Al. from that 2021 model. It doesn’t boot saying that the 3V/5V system is failing based on getting two red blinking lights and looking at the blink codes document. What do I need to fix it?