The centre 4-bank drop targets reset reliably when 3 are down but not when all 4 are down, even after adjusting.

4-bank drop targets reset 3 at a time but not all 4: strong springs and the rest ledge

Cause: The target springs were strong enough that the reset coil couldn't lift all four at once.

Checks

• Test with different combinations down: if 3 always reset and 4 don't, suspect spring tension.
• Check the plastic rest ledge the targets latch on for wear or misalignment.

Fix

• Stretch each drop target spring very slightly to weaken it.
• If the rest ledge is worn (part 545-6163-04), replace it or shim it out with thin washers.

Games

• The Beatles (Gold)

Source: Pinball Repair help group!! (Facebook group)