Jinsoku LE-1620 won't home

I am new to lasers. I have a Jinsoku LE-1620 mounted on a baseboard. I was going to burn a grid on the board. I started running the burn and it was light in color. I pushed the stop button and then the home button. The laser homed. I made some adjustments with the speed and percentage. I started it again then stopped it again to make adjustments. I rehomed it and started it again. I liked what it was looking like on the test board. The last time when it went home the Y axis went past home and was bumping the rail. That is all it will do now. I got an alarm lock on the console that says Invalid g-code ID:99. I need some help.

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