S2000 Keeps repeatedly saying ;Display passes self-test; but wont boot up ?

[octoolguy]

I don't mean to jump into someone else's problem but I'm having almost the exact same problem. I have not done any resetting with any chips. My cmos battery went dead because I had the machine turned off and after replacing both batteries on the motherboard, I now get the "display passes self test" message and the bill validator keeps recycling. I can't get it to go past this point. I have 2 yellow and 1 green LED's lit on the main board. I ordered a 17 and a 97 chip but haven't received them yet. I'm hoping that I won't need them but if I do, I will have them. My machine is the Double Diamond Deluxe with the reels that either go up or go down depending on the arrow direction. I'm new to all this so I hope I haven't made a fool of myself.

[therockinelvis]

Does the message change when you open the door? If yes, with door open turn JP key 3x and follow directions on display push button for 3 seconds, close door

[qbert]

Post a picture of your MPU.
Want to see the chips installed and the battery areas.

Split to new post.

[octoolguy]

I think I have isolated the problem to the bill validator. The yellow light never comes on and the validator just keeps recycling over and over. The display reads "display self-test passes" but it never goes to the memory test as it used to. All of this has come about since replacing the batteries on the motherboard. The machine used to function perfectly but to save on electricity I started turning it off at night or when we weren't playing it. It sat long enough that the cmos battery went dead and I noticed the large main battery had started to deteriorate so I replaced both of them. Now, I have this problem and can't figure out why.

[octoolguy]

Post a picture of your MPU.
Want to see the chips installed and the battery areas.

Split to new post.

Is the MPU what I am calling the motherboard? I'll have to take it out. Back in a bit.

[qbert]

The board in the tray is the MPU. The motherboard is the one that the tray plugs into on the back wall of the cabinet. And make sure the power is off when removing or installing it.

[octoolguy]

Here it is.

[Jim]

check your yellow battery,  it may be in backwards??  can't really tell when I enlarge it.

Jim

[octoolguy]

check your yellow battery,  it may be in backwards??  can't really tell when I enlarge it.

Jim

YOu have a sharp eye. You might just be right. Thanks.

[qbert]

Good eye Jim.
That's why we ask for pictures.
Also you can remove the green battery it is not required and causes problems down the road.
Let us know how it works out.

[octoolguy]

Well folks, we are making some headway. I reinstalled the coin battery. Correctly this time I might add. Now, the machine goes through the boot process but stops and flashes over and over "door open M, closure B". I don't know where to go from here. Any help would be greatly appreciated. Thanks for all the help so far.

[qbert]

If that is flashing then try adjusting the photo eyes on the door..
Take a piece of masking tape and put it on the outside of the door where the optics are. Place tape on both the door and the cabinet. Open the door and put the latch in the closed position.  Now mark where the door optics are on the masking tape you put on the outside of the door. Next close and latch the door extend the mark you made on the door to the masking tape on the cabinet. Open the door and carefully loosen the screws holding the cabinet optics and move the optic so that it lines up with the tape mark you just made.
See if that does anything.

[Tilt]

I noticed the large main battery had started to deteriorate...

More than likely this is the cause of your door open m problem.  The leaking varta battery damaged circuit traces used by the door detection circuitry.  Try the alignment procedure, maybe you'll be lucky, but I wouldn't bet on it.

[octoolguy]

A new problem has cropped up now. I get a reel tilt message and the reels turn very slowly. I found that I can get rid of most of the error messages by raising and lowering the door latch button. None of this ever happened before I let the machine sit for a year or so. So any of this be caused by just the dampness in our air. I'm a mile from the ocean but the machine is in my office indoors. Also, someone mentioned damage from the Varta battery. Would it be visible to the naked eye? I looked but don't see any signs of broken or corroded traces. I'm a total newbie to slot repairs but I have a good basic understanding of mechanics and some electronics. I'm able to follow along here but I do appreciate it if you can be really clear on what you are suggesting. I'm not up on all the nomenclature and the component names. GO SLOW. I'm also 77 years old.

[qbert]

Alignment will cause the problems you described.
Try slightly not closing the latch all the way down leave it push it all the way down and pick it up by an 1/8 inch and see if it works

[octoolguy]

I tried that. I have lifted the door, opened and closed the door and done everything I can think of. I depressed the little button and held it for 3 seconds and then turned the barrel key. The reels spun fast but then slowed down again. Now, I have 3 error messages, door M, closure B and general reel tilt. I'm really at a loss.

[octoolguy]

Okay, here's the latest. I turned it on, it went through the boot process and spun the wheels but then they came to a very slow roll and I got a droning sound. I opened the door, pushed the tiny little button on the MBU and held it for 3 seconds. Then I turned the barrel key once and the droning stopped and the wheels spun. I closed the door and it seemed like it used to. I started feeding coins. Some would drop all the way through into the tray. When I got it to say 3 credits, I spun the wheels. They spun but I didn't get any payoffs. I did that 3 or 4 times. Each time, some of the coins dropped straight through to the tray but some stayed. I was able to play maybe 6 times and then all of a sudden the wheels went back into that slow roll and the droning sound came out of the speakers again. So, that's where I'm at. It seems to want to work as it should but just can't seem to find it's groove.

[octoolguy]

I'm in Huntington Beach, Cal Anybody know anybody close to me? I'd sure love to have someone look at this thing.

[qbert]

All of your issues are happening because the main door is not fully sensing that it's closed. That is solved with alignment of the optics like I described or the MPU  was damaged from the old leaking green battery.
That is why we don't replace that battery it ruins boards.
Yours however sounds more like alignment the optics are turning on and off. That's why coins are dropping through and reels are tilting etc.
Did you try the alignment?
Since you said moving the lever up just a touch did not work try moving the optic on the cabinet 1/16 to 1/8 inch up. If  you tried the alignment and this doesn't work most likely the MPU has gone bad.

[octoolguy]

I haven't done the sensor realignment yet. I'm going to do it tomorrow. Thanks so much. I have been watching a series of 4 youtube videos done by Ryengoth. He says he's on this forum but I can't locate him. Anyway, I think you are right about the door adjustment. I'll let you know. Thanks again. I'll see you tomorrow.