Algolaser alpha

Hi i have a Algolaser Alpha working with lightbern it was working for the last 5 jobs now on switch on light pulses amber if i go to frame blue light comes on but no lights on top of actual laser were it says laser power motor will move but will not engrave as no laser light showing did a rehome but nothing message says
ALARM:1
Hard limit triggered. Machine position is likely lost due to sudden and immediate halt. Re-homing is highly recommended.
[MSG:Reset to continue]
AlgoLaser Alpha Ready!
ALF:108_RC1.
ALH:AlgoLaser AM V1.2.
ALM:GENERAL.
GrblHAL 1.1f [‘$’ or ‘$HELP’ for help]
MSG:‘$H’|‘$X’ to unlock]
[MSG:3:Warning: Caution: Unlocked]
ok
[MSG:25:Info: USB SERIAL STREAM CONNECTED]
A
lgoLaser Alpha Ready!
ALF:108_RC1.
ALH:AlgoLaser AM V1.2.
Any help would be grateful cheers J