WMS ERROR MESSAGE “Non-Volatile ram Fault”

[Jtwigs14]

I’m working on a WMS now not to sure what kind first time working on these but I am receiving a “ WMS ERROR MESSAGE “Non-Volatile ram Fault” is that error a key chip will fix or what do I need to do now thanks again attached are some images of machine an machine board

[rickhunter]

The batteries on your MPU are probably bad.  If you replace the batteries while the machine is powered up (although I have never done it this way, I was told it would work), you don't need to clear the machine, but you probably have to power cycle after changing them.  I always power off MPU, replace batteries, clear machine and setup again.  I've always been paranoid of replacing parts on an mpu while powered up.

[Jtwigs14]

Ya I’ve never changed the batteries with the machine on either would you happen to know what key chip I would need in order to clear it so I can go ahead an get one on the way? Because if I change them with it off then I would need to clear it correct?

[rickhunter]

It's a BB1, 1810 clear is the latest clear for that machine.

[Jtwigs14]

Ok thank you do the chip come in different sizes as far as like I found one with 64MB is that the one

[rickhunter]

All BB1 clear cards are 64MB

[Jtwigs14]

Ok thank you so much also do I take out the game card when I do the clear or just the operating system cards? Also I am attaching a picture the model of it is a BBS is that also the same thing an can it use the same clear card

[RB]

I have one. PM if interested.

[rickhunter]

The model of the machine doesn't really matter in this case, since you could also put a NXT2 mpu on it which coincidentally can use the same clear 1810.  You only need to remove/replace the OS card while doing a clear, you can leave the game card alone.

[Jtwigs14]

Ok thank you I’m ordering a clear card now

[Jtwigs14]

Ok so I have received my clear card I did the clear an I’m still receiving the same error message as before

[Jtwigs14]

Attached photo

[rickhunter]

Did you replace the battery before you performed the ram clear?  Also make sure the mpu is latched all the way into the backplane.  There's a lever on the bottom right side of the mpu, you need to pull down on the lever and it should move about 1 to 1.5 inches when the mpu is latched.

[Jtwigs14]

I’m not seeing the latch you are talking about, I changed the batteries then did the ram clear then put operating an game in an got this message

[rickhunter]

Latch is inside the squre.  It has a black rubber sleeve on it.  Also the batteries appear to be in the wrong direction.  The positive side (flat) faces down, your photo appears (although not entirely sure) to have the batteries with the positive side up.

[Jtwigs14]

Ok so with the latch I messed with it a couple times do I leave it forward or backwards when I shift it, all the lights are lite green so I’m assuming the batteries are on correct

[rickhunter]

The lights just indicate the different power rails coming into the mpu are correct, it has nothing to do with the batteries.  Did you check both batteries' orientation to make sure the flat side is facing down?