New Life Games Tech Forums

 :103- I'm back again, I am having issues with Game King boards "3902", the errors are: puzzled screen, security Code, coin in jam, meter disconnected, no signal, red screen.  :103-
 :99- I would really appreciate any and all assistance.

The NooB has spoken  :131-

It sounds like you are having multiple issues with multiple units. It would be best to tackle them one at a time and to describe each issue at hand in detail.

coin  jam , and meter should be  the board on front door not  in all the way  other could be simm not  seated right

I too have a 3902 board with a coin in jam , meter disconnected error,  Mr Blueridge ( JIM ) tells me it is most likely a bad chip at U 74 on the main board.  I have tryed this board in 5 different GKs and the error follows with the board. 

bring the board up with you

Well statfreak, yes multi issues. I would like to start with the coin in jam. I don't think it's not the I/O cards, I removed the coin collecting part and put in a bypass, I swap the the gameboards with the same software and the coin in jam is gone. I have been told to replace the U74 chip but I dint think I can. if you know how to remove it would you u please explain.
thank you for your input


slotsteve,  the I/O cards are good its just the board, what do you mean by simm not seated right?
thank you for your response



Buzz, yeah my only issue is that i am unfamiliar with how to unsolder when it is only soldier on top, do you have any tips on how to? thanx for your line.

I would like to tell you just how it's done but I have never changed out one of he smaller chips. Truth of the matter I can't even find U 74 on my board. thinking maybe I wrote it down wrong when Jim gave it to me he did say the chip # was MM 74C240 WM Fairchild  P09AB. If your in a big hurry give Joey a call at NLG ( phone # is at top right of every page on this site ) I'm sure he would repair it for you,

You didn't write it down wrong, look near the connector for the M M Lite Board on the end near the edge connector, I will try to post a pic

here is a pic of U74 buzz.

MorfZilla, coin in jam, meter disconnected is due u74 are broken;   see the pic. You can use this metod to desoldering the chip and change this.      http://www.youtube.com/watch?v=OiRaOEgJ2Qg .  I hope that this helps you

et2399, K+ for posting that desoldering video. :3-

Looks like the person in the video did this AT least one time before. :97- :97-

Amazing, if you know what your doing. I have learned how to solder a battery
in with a cold solder joint and still work. :5-

Ron