Quoted from pacman11:
Okay yes, I am getting the same voltage on the backside of the board as the front. I tired soldering it differentLy to see if it would work by switching the wires to the other positive and negative sides of the battery. Regardless it’s doesn’t work..
Pulled this from pinball repair guides. Some other things to check now that you know the board is getting battery power.
Is Power getting Past the Battery Holder? (bad diode D2 or RAM U8)
If the battery holder is OK, next check to see if power it getting past the battery holder. Find CPU board diode D2 (1n4148, all WPC revisions); this is a small glass diode, right next to diode D1 (1n5817). To find D2, on WPC-S and prior, look to the right of the big square chip U9. On WPC-95, look just below the battery holder. With your game off and new batteries installed, put your DDM on DC volts and put the black lead on the backbox ground strap. Then put the red lead on diode D2 on the CPU board. The banded side of the diode should show about 1/2 volts less than the non-banded side (which should be about 4.3 volts). If only one side of the diode shows voltage, or both sides show the same voltage, this diode D2 is bad. Diode D2 is a 1N4148 or 1N914 diode. The D2 can be replaced with a 1n4001 in a pinch (the 1n4148 or 1n914 is a 'faster' diode, but in this situation a 1n4001 will work fine.) Note that diode D1 is a 1n5817, which has a low .2 volt forward voltage drop. In a pinch a 1n4001 can be substituted here too (with a .4 volt forward voltage drop, not quite as much power gets to the ASIC/RAM when the game is turned on). But using a 1n5817 gives the game better power management to the RAM/ASIC when the game is turned on.
Next test for voltage at the CPU U8 RAM chip (all WPC revisions). With the game off, you should get about 4.3 volts DC at pins 26, 27 or 28 of chip U8. If you don't, the battery voltage is not getting to the U8 RAM chip, and the game will boot up with the "Factory Settings Restored" error. Note pin 28 of the 28 pin U8 chip is in the same position as pin 1 of the chip, but on the opposite row of pins. Pin 1 is designated with an impressed "dot" right on the top of the chip.
There can still be problems even if a new batteries are installed and all the voltages check out. If the game is still giving "Factory Setting Restored" or "Set Time and Date" errors, there may be a bad CPU U8 RAM chip. This does happen where a bad U8 RAM will suck the life out of new batteries, causing them to go dead in one to four weeks. But make sure to double check that battery holder. Even minor corrosion can cause this problem. The voltages may all check out, but the corrosion may be enough to limit CURRENT, and cause this problem. The U8 RAM chip is a 6264-L or 2064 RAM chip.