Older gameking troubleshooting question

[Tony5555]

I have an older gameking prod date 11/96 model number XA97D
I have not powered up the machine for a year until last night and I powered up the machine and the screen says non recoverable error turn key switch to clear then I turn turn key switch and the screens hold test button down for 2 to 3 seconds and then the screen says intailizing game please wait and you can here the bill validator and nothing it just goes back to intailizing game please wait and bill validator  powers up. Can anyone please help me out and let me know what I can do to fix it? Here is info from the board assy number 7570380 it has a intel I. 960 chip and a Xilinx chip i know its an older board it has a key you put in the board and turn to lock the board. Any help would be greatly appreciated  Thanks Tony

[brianfink]

Try checking/changing the battery on the cpu and if that does not work try a ram clear probly key 97. if that does not doit you probly have a bad board or power supply

[JScott]

Sounds like you need a clear chip performed.
E square chip

[turniphead]

swap out the dc switching power supply located on the back wall of the lower part of the cabinet; behind where a hopper would be/is.