hard to tell at this point. my pal has made it back to life ! psu shortcircuit blown : the 220v cable !, the screen + the 5 volts +we guess the "breakers".
it starts again. but even if it runs in tests in 4 directions !! the game corrupts on startup and so it cannot move. i ordered a bunch of 10 triacs from usa (i wait..). and i will go to electronic local shop at next holidays (i live ~2hrs distance from the arcade warehouse for our games..) with the "5k" ohms which drive the directions. because i cannot see what kind of model it is. only a number "76" is labelled in it ?!
yep i printed all the scans/pdf manuals i could on the net. i hope it comes from the triacs. many americans on "klov" say about it, but is it "urban legend" ? . ...do they really repair the game ? as i dont see any information about the 5kohm pots precision too .. i have some doubt
good thing to have a AB upright, i have myself too. i took her motherboard.. my DX was without it too..
for a long while we thought that there were 3 different motherboards (visuals were kind of non 100% match);, for each dedicated game. luckily even the AB upright has the "DX" version in the tests !!

i salvaged already a small "5VDC part" and the monitor i guess later, i have too a problem with the "missiles" button, disconnected the wires , and i was lost.. something went wrong, i went to check the AB upright to redo it.. (nothing on internet about the connectivity, only schematics which are terrible to read or understand)
.. (i tried using a scaler cga to vga with a 19" tft screen, but colours are weird in white tones..)
so at this point i have something "BAD" about left/right test, ... only one time it passed thru...and i could play.. but with only up/right axis movement...
if triacs change, and 5kohm pots change dont solve the problem, i'll be stuck without understanding more i guess...

