ALIEN STAR issues.

[Arv]

Posted a pic in the Today I worked on thread, but thought I'd do a new thread for it.

So a 0 (out of shot) and a 4 on the displays. I am not that familiar with the 80a's so anyone else had this problem in the past?

 

[replicas]

Steady on Shaun, getting a game up and running???
Are you feeling alright.
Of all the games you have I must say you have chosen a cracker to get back working.
Such a great game Alien Star.

 

[Moonraker]

Original MPU or new one?

If original I guess you've checked for battery acid.

Any earthing mods done?

Have you swapped the orange cap in the cabinet?

 

[Arv]

Original mpu, ground mods done. Caps done getting all the correct voltages.

Surprisingly no leakage.

 

[Moonraker]

Good start then. Have you checked and/or replaced the edge connectors?

 

[Arv]

Not done that yet, got some pins on order.

 

[Paul]

Not done that yet, got some pins on order.

Where from Arv? I'm currently playing with night moves which is proving to be a pain, and have just ordered the 19 way connector from Andy N, and took a gamble (looking at some other forums for reference) that these would work....https://uk.rs-online.com/web/p/pcb-connector-contacts/6794714/

 

[Arv]

Same ones, not sure myself if they will work. But he who dares..

 

[Poibug]

Is it zero when trying to start a game ?

 

[Poibug]

Can you get in the diagnostics

 

[Poibug]

If interconnect loom knackered those pins are obsolete, but ya can use a cut down jamma connector

 

[Arv]

Can't start a game, can't get into diagnostics. I'm thinking the 7474 is gone.

 

[Moonraker]

Have you another system 80A game that you can swap the MPU with to confirm?