Why doesn't the laser marker work on my Makita mitre saw?

check for slide wear on the mounts
if it has any it allows the motor and saw to drop sideways and alter the cut angle
you can compensate by moving the setting that bit extra and the locking it up

Take unit back to the supplier, as FAULTY

Some mitre saws have extra windings in the field coil so a possibility is a break in this brake coil another possibility is the switch some have a contact that switches the back emf from the field coil to the brake coil when you release the trigger. And believe or it or not some times changing the brushes affects the braking have seen this a few times on the LS1013.

I would plug it into another outlet first. The small arcing that you see might be normal especially on stopping because of the brake. If another outlet doesn't work then I would take it back. Upon startup this saw will draw more than the rated running amps.

Sounds as if the blade is dull. Or perhaps bent. A dull or bent blade blade will 'grab' the wood, rather than cut it, resulting in binding, or kickbacks.

Solution; replace the blade with a fine-toothed, good quality blade. If the blade is new, then check that the blade is bolted tight on the arbor. If the blade is loose, it can result in kickbacks.

Also, check that all the bolts/fasteners/locking mechanisms on the saw are tight, and in good working order. Sometimes a tool new out-of-the-box will have loose screws/nuts/bolts that need to be tightened up.

Also, when cutting, use a smooth, slow, motion, being sure to give the saw the time it needs to make the cut.

You can get it at Makita.com, type in yr modal number in the search bar, download a parts breakdown or a manual, if not u can order a new sticker from makita.

move the blade until it is square to the fence then loosen the screws on the table with the degree increments and set to zero.

Check the power cable. They could be broken or frayed and you are not getting enough power to it replace and then try to see if it works then. Make sure you buy the right size gauge for you machine

you have to turn the handle, it works like a bolt, you cant see it but it is tied in, you have to unscrew it before trying to move it