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TP2 at power supply, or MPU? The MPU TP2 is a return(ground) you won't see DC voltage there. TP2 on power supply is +190VDC for the displays. Do you have schematics?
TP1 MPU should be +5VDC, if you don't see it there, do you have +5VDC at TP1 power supply board? Not sure why you are asking about AC voltages - not important until finding out where/what DC voltage(s) might be missing.
Quoted from eabundy:TP1 is 5.2v, Test Point 3 14v
Changed the 6803 CPU chip and now the game has a solid LED on the MPU board. At first I think it blinked about 3 times, but hasn't done that since, only one solid LED at power on.
You don't have a power problem. The solid LED is indicating no boot up errors. The time it blinked three times indicated a possible U4 error.
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Berea, OH