I know this may sound stupid but I have to try and cover the bases....
When I first got mine, I tried to balance by pulling the trigger (pinpoint) instead of pushing.
Also, try all said above along with switching coils to rule out the coil as long as you have another.
If you keep having an issue, contact dilek for further troubleshooting....
Dilek@noktadetectors.com
Also check your isat settings. I lowered mine down early on but usually only affects the mineral indication.
While you're at it make sure you aren't using ground tracking in any of the disc modes. Only use that In all metal.
I would, if all else failed, reset to factory default and maybe new batteries but I don't see the batteries being the issue if the meter is showing power.
Most of these may seem Ludacris but it's best to remove all other possibilities before making an issue for dilek. But by all means if these don't work co tact dilek for further professional assistance