Lightburn will not conect to laser

all was great then then next morning lightburn wont connect to laser, its trying to home but just get busy signal nothing happens been trying fo 3 days

Did you check which COM port was assigned in device manager and then check in LB if you selected the correct one?

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Yes checked everything I could think off, machine will fire, but appears to be trying to home but can’t fitted limit switches 1 year ago no issues till now