My first solid state after a few EM's, so a lot of learning to do. A system 80A Jacks to Open. Machine lights up when on switch is pressed. Shows 0 credits. All scores do light although right side scores are very dim but do show 0. Credits are set to 1 quarter is 1 credit. Dropping in a credit either passes through to coin box or is rejected but either way no credit is registered. Manually trying to add credits doesn't do anything either. Start doesn't work as a result of no credits. Self test button doesn't seem to work to get into bookkeeping. Sound test on SB1-1 works and I get sound. No obvious damage from battery to the boards, it has been removed. Original owner had removed the battery several years ago when machine stopped working. Fuses look good.
Any advice for a new solid state owner?