Can't find home and laser head moves erratically

I installed a new motherboard becuase my Ortur Laser Master 2 burned everywhere it went (didn’t power off between cuts). I also built the recommended grounding system. When I try to move the laser to a new position, I get an error code. Also, when I click the home button, sometimes the laser goes to the bottom right, then to the home; but sometimes it goes to about 15 cm to the right of home and it stops. Another time, I clicked the up arrow to move the laser and it zigzagged to the right and left and up then acted like it was engraving. The console says it completed the streaming task. Any suggestions?
Rick Clark

Just tried to home the laser and received the following error:
homing fail. Could not find limit switch within search distance. Defined as 1.5 * max_travel on search and 5 * pulloff on locate phases.
Ortur Laser Master 2 Ready!
OLF 140.
Grbl 1.1h [’$’ for help]
[MSG:Check Limits]
[MSG:’$H’|’$X’ to unlock]
[MSG:Caution: Unlocked]

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