Does it count down the credits as it is dispenses the coins?

I don’t see a 4.7k  resistor close by. Could it be “R27” the 5.1k resistor on this board?

I should have one. PM me

Good evening to ALL. I replaced the battery on a S5500 and there’s a couple of issues I’m having.l The machine accepts bills, but NO credits appear on the display. The next is there’s NO sound at All. I noticed on my blazing 7’s there’s an audio board mounted on the the inside wall and nothing on this One, I haven’t seen this before. If I take the boards and swap them, both machines just continue to have the reels keep spinning when I turn them on. When I put them back to Original machines they play fine with the exception of No sound o the “7777” machine.
The board with blue tape on the chips is the one that has No sound.
The backplane wiring doesn’t have One of the Black connectors. Any enlightenment on this would be appreciated in learning the differences.
The second board is the Blazing 7’s I tried swapping.

Looking at buying a used machine but the seller stated,
"It worked perfectly until someone hit the cash out button. It ran out of nickels to spit out from the hopper. I reloaded the hopper and reset a few things and I’m still getting that error. He sent a video of the unit powering on, audible message about the machine and the reels do a test spin.
Anyone know how to reset the machine?
Thanks in advance