You've not given us much info... but I managed to locate what appears to be the project:
https://hvetebolle.blogspot.com/2017/08 ... a-sbc.html Your PCB is a later level than that shown in the link, but hopefully you can verify that the schematic is in fact correct.
Basic troubleshooting:
1- Measure all the chips to make sure they are getting +5 volts and that the grounds for each is also at ground.
2- Make sure the Reset signal is working, i.e., it goes for low for a period of time, then goes high.
3- With power off, make sure none of the address lines are shorted to each other, ditto for the data lines.
4- Check to see of the IRQ or NMI is going low, checl BE to ensure it's at +5V as well.
5- Ensure you have a running 1MHz clock signal.
6- Make sure ALL of the pins are straight and properly inserted into the socket... you might have one that curled under.
7- If all else fails, you'' likely end up metering the PCB to ensure all of the signals are correctly routed and have continuity without any shorts.
Then again, it's always possible that you have a bad chip on the board or the Arduino isn't correctly setup.