This is what I have from Clay:
If the CPU battery goes dead on a 6803 game, this can cause some problems. Every time the game is turned on with a dead battery, the U4 CMOS memory is at risk of containing erroneous data, and the game may not start play, or even take credits. The problem can be seen by viewing the adjustments, and checking the value for the adjustment in question. Often seen is 9999999 for an adjustment that should have a value 0,1,2 or 3. This can confuse the game enough to not allow a game to start.
To fix this, obviously replace the battery. The original NiCad rechargable should be replaced with AA batteries, as shown in the Battery Replacement & Corrosion section of this document. Also make sure you have a manual for the game! Unfortunately, the adjustments are not obvious, and a manual is needed to figure out what adjustment is what, and what value it should be set to!
After the battery is replaced and the manual acquired, power the game on. The first thing to check is the number of credits per game in the adjustments. Press the small push button inside the coin door, next to the volume control. This should put the game into audits and adjustments. Using the manual and the 6803 keypad (Dungeons & Dragons and prior), find the credits-per-play adjustment, and make sure this adjustment is set to a valid number! If this is not done, the game will probably not accept credits, and won't start play! After the credits-per-play are entered, set all the other game adjustments as desired.
One of the two boards give me 4 flashes,This leaves me at U8 not working correctly. The second board is just flashing once meaning U1not functioning . Ive switched chips on both boards an no avail.