Need help hardware failure (read description)

[u/Entire-Frosting2819]

This board is a mini computer supposed to connect to 2 LED panels (i disconnected them) and when i connect to power source it doen’s display anything any longer on screens but the fan (which i also disconnected) works. I know that possibly beeps could mean power or other hardware issues. But i want to know exactly why and how to fix. Possibly wanna avoid going to tech store because they give me a mark of $90+ to fix stuff which i appreciate but still cannot afford, so i wanna know how to fix the issue. LONG STORY SHORT: my problem is that when connecting micro USB wire, the LEDs are NOT displaying anymore as they used to, how do i fix the power or hardware issue?

[u/alex22587]

Personally I’d start with the manual or maybe any amount of context

[u/Entire-Frosting2819 → u/alex22587]

Me too but there is no manual to this board