The insert coin is lit up but doesn’t count quarters when I put them in...
The game installed in your cabinet is a two-coin game....it will ONLY accept up to two coins MAX.
If you want any winning credits to accumulate onto the display, you have to press the cash-credit button once before playing.
It should light up.... if not, then the lamp is burned out.
The flashing candle light means that the door is or was opened.
It will stop flashing after you complete one game.
If you opened the door and it stopped accepting quarters, that could indicate that the door latch isn't completely all the way down.
When you push the door latch fully all the way down, watch the [Coins Played] window on the reel glass display.
Whatever number is in there, should momentarily go out when the door optics are lined up...after a few seconds, the "Insert Coins" light should come on.
Again, the candle will keep flashing (indicating that the door was just opened), until you complete one game.
If after checking all this and your machine still doesn't accept up to two coins bet while the "Insert Coin" light is ON, then inspect your coin comparitor and coin-in optics for operation.
There are self-tests you can perform using the diagnostic flip cards in the S+ section of NLG.
Do the quarters fall back into the coin tray when you drop them into the slot in the coin head?
Or do they go into the coin hopper?