Some friends kids were having fun on the machine for a while,
when they came over to say the ball got stuck.
Having a look it was in the kickout hole and wouldn't leave.
Restarted the pin and noticed it was "playing" the startup tune on the bumpers instead of the chimes.

The machine played fine for the last years so trying to figure out what is causing this now.
I took a look at the mpu it still boots up with 7 flashes
test mode: Lights all ok, displays all ok, switch test gives a 0
but the solenoid test shows the following coils activated:

Self test #..Should fire................Does fire
1...............Outhole kicker...........Outhole kicker
2...............Knocker....................RIGHT SLINGSHOT
3...............Tophole saucer..........0
4...............Post down................LEFT THUMPER
5...............Chime 10.................RIGHT THUMPER
6...............Chime 100...............BOTTEM THUMPER
7...............Chime 1000.............LEFT SLINGSHOT
8...............Chime Extra.............LEFT DROP TARGET
9...............Left thumper bumper........Left thumper bumper
10.............Right thumper bumper......Right thumper bumper
11.............Bottom thumper bumper..Bottom thumper bumper
12.............Left drop target........Left drop target
13.............Right drop target......Right drop target
14.............Left slingshot............Left slingshot
15.............Right slingshot..........Right slingshot
16.............Post up....................0
17.............Coin lockout door.....Coin lockout door
18.............K1 relay...................K1 relay

Anyone ever had this occur before? And could give a pointer on where to start to look.
Thanks to all!

Quench you are brilliant!

I wiggled the red and white wire on the two ends and gave it a go.
Machine started up perfectly again.
Tomorrow i'll repin these anyway to make sure they stay fine.
Big thanks for the fast fix!