blasteroids stuck in test mode.

saleem

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bought a blasteroids,it was working first time this was advertised,no takers,so i ended up buying it second time round for £50 delivered but,it had a faulty sound and credit board when i bought it.

anyways,i bought a replacement sound/credit board and the cab worked.i thought i would trouble shoot and find out exactly what was wrong with the other board,so i tried the accompanying little board that gos with the credit board (its a quake something) and that was not the fault.it was somewhere on the credit board.well in test mode it said bad sound cpu,so i tried the cpu from the working board but,to no avail.

sticks the working board in with its cpu back onboard,cab is working.2 days later i thinks to myself "i know i will have a sesh on blasteroids" so powers it on only to be greeted by the test mode screen,the board pass's also.

so i tries the faulty board and it is still stuck.i swap the switchs from each board to the other that is flicked to turn on and off test mode and still same.i remove everything bar the monitor wires from the board and its still stuck in test mode.

am thinking its a chip,i located a chip on the schems that has test allocated to a pin with some pins for other things.should i replace it,its socketed?perhpas its a prob with another chip that is associated with it?

any other ideas what might have caused this prob,have you ever heard this happening before.

on side note,when the game plays its a realy good 2 player game.shame the cab i got has some damage to the vinyl and has no artwork whatsoever as it cant be bought as far as i know.
:)
 
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