An unlucky purchase

[Asayuki]

Hi,
I have added a new repair to the wiki. It's a Ghosts 'n' Goblins board which I bought recently.
The evil spirits residing in the EPROMs of this board as pixels came out and hunted me during the entire repair process. This is probably one of the most unlucky repairs I ever did, made worse by my stubborn wanting to take lightly something that wasn't easy per se.
I think you will have some fun reading it; and, as usual, the log contains technical info that I hope will be useful to the community.

Questions, comments, constructive criticism are welcome.

http://wiki.arcadeotaku.com/w/Ghost%27n ... epair_Logs

Cheers!

EDIT: Man, I DO HATE Arremers!

[Brettster]

wow that was an epic fix
Thoroughly enjoyed reading the log though

[Asayuki]

http://wiki.arcadeotaku.com/w/Ghost%27n ... epair_Logs

There's an update to this repair, because the board developed another fault. ...a quite difficult one!
I have also moved the repair to the top of the log for your convenience.

Man, I DO HATE Arremers!

I really really do! Is there anybody who knows an exorcist who is willing to visit my board?

Cheers!

[leonardoliveira]

So Goldstar TTLs are to be treated as "possibly as bad as Fujitsu TTLs" regarding developing faults on internal bonding?

[Asayuki]

So Goldstar TTLs are to be treated as "possibly as bad as Fujitsu TTLs" regarding developing faults on internal bonding?

It's hard to base a thesis on one single faulty IC out of God knows how many millions produced, but you do have a point there. The final issue really looked like faulty bonding on that GSS latch.