Location of logs on drive?

Installation Home Assistant OS
1

Hi, yesterday, all of a sudden lovelace stopped working. My HA OS is installed on a microSD card on a RPi3 B+. I can ping the Pi. But can’t retrieve anything from HA backend. On my iOS app I get the NSURLErrorDomain -1004 error. Nothing else. Where can I find the actual logs on the microSD card so I can post em here for further help?
By the way, HA was so easy to setup that I read the instructions once last year, set it up and forgot about it. So, I have minimal knowledge about the structure of the system. Bear with me please. Also, Last update I did on the HA core and OS was about two months ago if that helps in any form.

2

This is the path for an HA Supervised installation and (no guarantees) it may be the same for an HA OS installation.

/usr/share/hassio/homeassistant
3

thanks for the answer. i connected the RP to a monitor. It’s in a continuous boot loop. Managed to pick up at least one error: low voltage. looks like the power adapter is giving out!