Many problems with my Las Vegas by Olympia, help please

[AKSchonscheck]

Hello everyone and thank you for taking the time to read my thread and hopefully help me out! I just recently got into Pachislo machines in a big way, my favorite of the five I have so far has to by my Las Vegas machine, I just love the way it looks! Problem is there are many issues. The first is I don't know how to "cash out" or make it dispense coins... there is no dedicated button like there is on my other machines, so I figured maybe holding the "cancel" button would do it, well after a few seconds I hear what I believe is the insert coin solenoid hit and then I get hit with a "CE", "CR", or "E2" error, I cannot recall right now but it's my understanding they all point to the changer being faulty. I took the changer apart, everything looks ok, no broken wires and it spins by hand pretty freely, so no idea there. The second item, in order of importance, is that there is no sound. I've tried the little dip switches every way possible, I found a wire off of what looks like a mini potentiometer on one of the actual speakers, and I think I soldered that back on to where it should go, and I played with the potentiometers, but still no sound. The machine was pried open as the previous owner lost the key, and I see there was a sensor on the door, not sure what effect it may have on anything, I found it taped up with 3 coins in, I guess to keep it thinking the door is constantly closed, but I cannot be for sure. I took out the keyed resent switch and soldered in a automobile type switch which works, the red button on the back of the front panel that I thought was supposed to change the difficulty from 1 to 6 doesn't seem to do anything, instead a button on the power block makes the numbers change between 1 and 6, so no idea what the red square button does. I know this is a lot, but maybe someone here can help me, I hate not having it work... Photos attached.1.jpg3.jpg8.jpg5.jpg4.jpg7.jpg6.jpg2.jpg9.jpg