DJDONKEY

Fuse.

 

I think you need a 7.5v 5amp. Just take your fuse out the power supply. You will see one has exploded.

I'd ruled that out as he says "SOME" of the tubes are not paying. If it was the fuse, all of the tubes wouldn't pay

Try swapping the connections from the working tubes to the non-working ones

You can then determine if it is the solenoid faulty or the board.

If you have a multimeter, test the connections to the solenoids as they pulse - put it in test mode - they should be around 50v.

First thing with the board is to check if the battery has leaked - probable - and see if there is any damage to transistors T12 - T19 and triacs TR1 to TR8

Photo's will help

Totally agree - that is Justice.

Saves the tax payer some money too! (though knowing our system, he would have got away with a slapped wrist)

Sometimes, the battery looks OK, but is damaged underneath and yes it is soldered to the motherboard.

Take a close-up picture and post it here

Bencrest is right, if you have another machine, try that board as it could be a "short" causing lighting problems.

I would guess scorp 4 if it is an original £25 or £35 DOND.

These machines are getting to the age where battery leakage could start to be an issue.

First thing is to take off the cover of the MPU (usually on the back of a front opening scorp 4) and see if there is leakage from the green battery (near the middle of the board)