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**Reel Slots** Gaming Machines => IGT Reel Touch Games => Topic started by: Timarich8 on September 01, 2015, 01:42:31 PM

Title: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 01, 2015, 01:42:31 PM
We purchased a used Reel Touch slot machine and when I turned it on it gave me a CMOS CHECKSUM ERROR message.  I figured out how to hook a keyboard up to it and pressed the F1 key for it to continue.  It looked as though it was going to download everything and then a blue screen came on.  On the screen it says: in the top left corner, Accounting, History and I/O Tests.  Then at the bottom it says up, down, enter and exit.  It will not let me use the keyboard at all.  I'm stuck and getting frustrated.  Can someone please help?  Thanks!
Title: Re: CMOS CHECKSUM ERROR
Post by: cowboygames on September 01, 2015, 02:09:02 PM
Have you tried opening and closing the door?
Title: Re: CMOS CHECKSUM ERROR
Post by: cowboygames on September 01, 2015, 02:17:08 PM
Based on the origional error, you could have a low or dead cmos battery in the top box computer. You might want to open that cpu up and check it. I believe it's a 2032 battery, same as any other CPU uses. While you're at it, with the machine turned off, pull the MPU tray out from the base of the machine and check it's battery also. It likely has 2 on the tray, one will be either a socketed or slide in coin battery and the other will be a green 3 cell rechargeable battery. If the coin cell is socketed then the 3 cell needs to be good and have a charge for the game to operate properly. If the coin cell on the lower MPU is soldered in, then the 3 cell can be discarded as it's not needed in a home use environment and you will avoid problems down the road related to corrosion.

Welcome to NLG!
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 01, 2015, 02:26:02 PM
I shut the door and it gave me a message saying there is a problem with this machine.  Please call attendant.
Title: Re: CMOS CHECKSUM ERROR
Post by: cowboygames on September 01, 2015, 02:31:32 PM
If you now open the door an alarm should go off. Using the jackpot reset key on the side of the machine, turn the key 3 times and the message on the VFD should say "press and hold the test button for 3 seconds. The test button is on the leading edge of the MPU in the lower part of the cabinet and it is white. After holding the button for 3 seconds and releasing it the message on the VFD should change to "close the door". Machine should reset after that and either work or come up with another message. Give it a shot...
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 01, 2015, 03:29:36 PM
Cowboygames, can you tell me how to open the top box computer?  Is that the box on the back of the monitor? As you can tell, I'm not very good with computers.
Title: Re: CMOS CHECKSUM ERROR
Post by: cowboygames on September 01, 2015, 03:48:41 PM
It IS the box on the back of the monitor, there are 6(?) Screws that hold it shut and I believe you have to unplug some stuff to swing it open so be careful. Do everything with the power off.
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 01, 2015, 03:52:27 PM
I also tried to reset it like you told me and it took me back to that same screen with the Accounting and History on it.  i see the screws, thank you so far for your help, I appreciate it.  I will let you know what I find out. 
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 01, 2015, 04:16:36 PM
The bottom MPU board has a soldered coin battery and a green rechargeable battery.  Now the green battery has some corrosion on it.  What would you recommend I do with the green battery and how am I to replace the soldered one?
Title: Re: CMOS CHECKSUM ERROR
Post by: cowboygames on September 01, 2015, 04:49:36 PM
Both batteries require desoldering for removal. The upside is that you can either replace the coin battery with another mounted battery or have/put a socket on, same as computers have, and use a socketed battery. When you open and close the door does the machine do anything to indicate or acknowledge the door has been closed such as the bill validator cycling or the reels spinning? If not then either the door isn't getting latched completely or the corrosion on that green battery has damaged the MPU board.
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 01, 2015, 05:36:09 PM
Well I replaced the battery on the top box. 
The machine doesn't do anything when I open or close the door.  I checked to make sure and the door is completely closed, so that's not a good sign.   Can you tell me where can I take the the MPU board to have those batteries done and to have the MPU tested to see if it's working properly?  A computer place?
Title: Re: CMOS CHECKSUM ERROR
Post by: cowboygames on September 01, 2015, 05:56:01 PM
Batteries plus could probably help you out. One thing you might try and another member brought this up to me, is to unplug the wires from the reset key switch on the side of the machine, then reclose the door. There's some indication from what you've posted that it may be not working properly. Make sure to cover the wires while disconnected to protect from shorting
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 01, 2015, 06:23:38 PM
Okay we're making some improvements.  I know longer get the CMOS Error.  Now the computer runs all the way where the wheels turn and then the message says call attendant again and down in the small message area on the door it says "door open M and input shorted.  We have unplugged the door like you recommended also and it's the same message both ways.
Title: Re: CMOS CHECKSUM ERROR
Post by: cowboygames on September 01, 2015, 06:54:17 PM
Input shorted I've never seen, but it could easily be the corrosion on that green battery where acid leaked down on the board. You could try cleaning that area of the board with some baking soda and rinse well, allow to dry thoroughly
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 02, 2015, 08:32:11 AM
I dropped it off at Batteries Plus and they are desoldering and giving me a new battery.  He is also going to check my MPU board to see if there is any damage from the corrosion.  I'll update later on to let you know if it works.   :wave:
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 02, 2015, 04:25:19 PM
I got both of the batteries replaced and they said that no corrosion touched the MPU board at all.  Both batteries in the MPU were under 1 volt.  So I brought the board back home put It back In the area I got it from.  Turned it on and I got the same stinking message as before.  Door Open M, input shorted.  Is there any suggestions as to how I can find out what this means?
Title: Re: CMOS CHECKSUM ERROR
Post by: rokgpsman on September 02, 2015, 04:36:30 PM
In an old thread on NLG this "Door Open M, input shorted" error was attributed to a bad I/O card. Read down about halfway to see the discussion:

http://newlifegames.net/nlg/index.php?action=printpage;topic=15183.0 (http://newlifegames.net/nlg/index.php?action=printpage;topic=15183.0)
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 02, 2015, 04:48:32 PM
Thanks Rokgypman for that info..
Can anyone tell me where the I/O board is located?

Title: Re: CMOS CHECKSUM ERROR
Post by: Shaggy on September 02, 2015, 04:53:14 PM
I/O cards are located in the door of the machine on a S2000 probably the same for yours. Some people call them suitcases.
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 02, 2015, 05:27:26 PM
There is two cards on the door.  Does this look like it?
Title: Re: CMOS CHECKSUM ERROR
Post by: rokgpsman on September 02, 2015, 05:54:00 PM
reversed photo in case it helps
Title: Re: CMOS CHECKSUM ERROR
Post by: cowboygames on September 02, 2015, 05:58:56 PM
The shorted input could well be a bad IO card. The door open M is a different issue related to the door optics or the belly door swich. The belly door switch, which is tied into the main door optics, is located in the upper left corner of the belly door opening. You can open the belly door by pulling on the knob located next to the main door release lever. The belly door switch can be bypassed by simply removing the wires from it, shorting them together and insulating them with a wire nut, electrical tape, etc. This may not fix that door open M issue, but it will eliminate the possibility of it being a problem and it's not needed in a home environment in any case. Same goes for the cash box door switch
Title: Re: CMOS CHECKSUM ERROR
Post by: Timarich8 on September 02, 2015, 06:31:11 PM
Is there a place where I can take the I/O card to see if it's working?  Or do I just buy a new one and see if it changes anything?  I think I've bit off more then I can choose with this machine. LOL
Title: Re: CMOS CHECKSUM ERROR
Post by: rokgpsman on September 02, 2015, 06:39:54 PM
Sometimes a problem like this seems like a major ordeal but usually even novices or first-time owners get things going, with help from others. On the plus side you'll learn much more about your machine and be better informed on how it works. Even the slot people in casinos had to learn when they first started out. Hang in there, most likely all will be fine soon.

From what I know the Door Open M error is a reference to the Main door (instead of the cash box door or the door to the overflow compartment in the slot stand). The Door Open M error is often caused by either faulty door optic sensors (bad or misaligned), or door switch. And wires to these parts can be broken or pinched also. Obviously the casino doesn't want the machine door to be open and allow access to money by unauthorized people so they require that type of sensing. It can be a pain to home owners until resolved.

If you happen to live near a slot machine dealer or service place they could probably help, you'd have to call to see what they could do and what the charge would be. Also, if someone in your area has a similar machine they could help by trying your I/O boards in their machine, or their I/O boards in yours. And you could send the boards out to a shop to have them tested but that might be more cost than just buying a good used board for a lower cost.

You could post your general location here (be careful to not say your exact address except in a private message) and if anyone on NLG was near that city they might offer to help. To contact a person privately look over to the left of one of their messages and click on "Private Message".


To identify the I/O board specifically (and any other circuit board) you can look for an IGT part number written on it somewhere, often near one corner but can be anyplace. You can also post a picture of the board and others here can help id it. That way if you decide to order one you'll know the correct board to get.


Also, I looked back thru your messages but didn't see exactly what your machine model is. Can you post a photo of the entire machine from the front and also the idplate (usually on right side below handle) that clearly shows the model number? That will help others to make sure you get the best help.
Title: Re: CMOS CHECKSUM ERROR
Post by: cowboygames on September 02, 2015, 06:47:10 PM
There's really no way to test an IO card, caveat here is that they are pretty inexpensive. You have 2 on the door, you could try removing them one at a time, turn the machine on and see if the message changes. There's also one mounted to the housing your MPU slides into, smae deal, you could remove it, turn the machine on and see what happens. You can't hurt anything by turning the machine on with any of those cards out, just don't put them in or take them out with the machine on
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