Stopped firing. Battery and fuse are fine.

Is it an semi auto or bolt action could be the safety is not all the way released if the semi is open any at all it will not fire and the same for a bolt action the bolt has to be all the way down hope this helps Merry Christmas

Some trigger valves (tva6) are sensitive (defective?) however there are some things you can try to change how the gun acts. I have noticed that the brand of oil has an effect on the orings. Some brands will swell the orings, I like Paslode nail gun oil. Do not wash the gun with gasoline or wd40. Use diesel. Change the nail depth setting one position. Lowering the air pressure will make a difference. I find that most operators use too much pressure. A stronger safety spring under the trigger will separate the trigger and firing pin quicker. Finally you could use single fire trigger. Good luck

It takes about 250 rounds to break in a gun. Try some hotter ammo and see if the problem disappears, if so, call Marlin and ask them for their solution if you want to keep using Federal, you might want to try some Remington standard velocity target, it is very accurate in most guns.
I would shoot it for at least 500 rounds and clean it from powder debris in chamber and receiver bolt and trigger group and try it again, however don't hesitate to get a hold of Marlin, they are nice folks.

If no air is leaking from the gun, take out the nails, remove trigger by removing 3mm hex head bolt to expose the trigger pin. With air connected and side door open so that you can see the feeder, quickly depress the trigger pin with finger. Gun should fire. If gun does not fire (only makes air sound at trigger) dissconnect airline, remove head and lube headvalve with white grease and reinstall. Test again. If ok replace trigger. If still no joy, replace trigger valve with new factory or generic (part # TVA6). If gun fires but does not activate the feeder claw, remove two 6mm hex bolts from front of gun and split apart upper and lower body and check white oring (part # 149885) Good luck

check your fuses as a start then check relays and then fuel pressure because the filter could have only 1000 miles on it and have problems with it and it could also be the coil pack died on it .

It's vary common for places to not fill Co2 tanks correctly and it sounds like this is your problem. Try having your tank filled in a different store, If this doesn't work you should exchange the gun at the store you bought it or call Tippmann, they have a excellent 2 year warranty.

Check with the mfg of gun for adjustments to be made on firing mechanism. Firing pin long enough?

Make sure your battery is new. It doesn't take a lot of voltage drop to affect performance.

Make sure your marker is clean, and properly lubed with a quality oil make for paintball.

Make sure your board connections are secure. You can change modes on the e-trigger yes? Go through them and fire a few times in each to ensure it's changing.

Make sure you have a full tank of air while your testing to make sure this isn't a problem as well, or causing your issues.

Good luck!

Play hard, play safe, play with honor!

8^)

piston is probably jammed

This happens sometimes try holding it up against a board with the trigger depressed and then inset the battery.

The goal is to try to force the firing sequence to get the piston back to the right position with corded units this is simply done by attaching the air hose with the trigger pulled this causes air to rush into the gun chamber pushing the piston back and firing a nail out.

The cause of this is a misfire or jammed nail that stopped the piston in the wrong location so air will not build in the chamber correctly.

Hope that helps