If you can go to Bally/United BINGO pinball by Bingo Butch you will be able to have alot of people help you faster. First make sure all bulbs are not burnt out. Then I would go to tour odds unit and clean that up

They are located at location L 10-12. .......upper left on the schematic. See attachment.
The lamps in each group are wired together; there are 8 groups for scoring.
As stated above......you probably have a stepper unit that needs cleaning, most likely the WiperArm.

ScreenHunter_117 Nov. 04 05.08 (resized).jpg

Agreed with both above - it's almost certainly just dirt on the score unit. But could be a broken wire #40 between 1st EB and the score lights. Very unlikely, but possible.

Do the scores flash when the start relay is pressed? As shown in the snippet above, that bypasses the score unit, so you could narrow it down a bit more easily.

I would start by trying to get the 'Start relay' to energize..
Clean and adj. the contacts on all 5 Relay Bank switches. Make sure the 'SPDT' sw. on' E.B. Play'
relay at loc. F4 is set correctly.
I would put games on the Replay Counter, worry about the coin sw. later.
********** Have Fun ******

just to be pedantic … 'cause everyone loves a nitpicky git ... the replay register is the unit with the numbered reels showing the credits. The replay counter is the unit that stops payout when the right number of credits are added.

on big time, there's one replay counter and it's on the top left of the lamp panel inside the head. On many later games, there's a replay counter for each color you can independently score or for every card on a multi-card machine.

if you add credits to the replay register with the power off and you don't want them removed when you turn the game on, hold down the anti-cheat relay armature/plate while turning on the game.

since big time has the older style relays with metal tab over the armature, you can stick a hunk of folded paper between the tab and armature to hold down the armature. Do it a bit loosely to avoid coil buzzing.

keeping the anti-cheat closed between power cycles is handy when working on the game. The machine will keep doing whatever it was doing when you turn the power off/on.

manually resetting the replay counter will let the game pay again, and if the timer unit steps up all the way and tilts the machine, reset the timer unit and untrip the tilt trip relay with your finger.

just to be pedantic … 'cause everyone loves a nitpicky git ... the replay register is the unit with the numbered reels showing the credits. The replay counter is the unit that stops payout when the right number of credits are added.
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I stand corrected............... No problem.
I always thought it was a Counter......
Anyway......... You have to get the 'start relay' to Power On......
I assume you have all the Voltages and no blown fuses!
I'm thinking the 'SPDT' contact on the ' E. B. Play' relay is mis-adjusted.
Let us know how you are doing.....

You get r up and running