4000 expansion cards not recognized

[redrumloa]

Splurge wrote:
Tried an old Trumpcard Pro in there and it isnt being found either, so it sounds like its a zorro problem.  Any way to determine if its my daughter board or Buster.

Yeah, does sound like a problem with the Amiga itself :-/ Maybe try removing the daughter board and cleaning the contacts :-?

[Splurge]

yeah, tried cleaning it already.  Going to pull and reseat the buster tomorrow.

[Splurge]

Reseated buster and still nothing.  Anyone possibly have a buster I can test out, even if its a Rev 9?  I'm running out of ideas...

[redrumloa]

Splurge wrote:
Reseated buster and still nothing.  Anyone possibly have a buster I can test out, even if its a Rev 9?  I'm running out of ideas...

Do you happen to have a service manual for the A4000? It has been a long time for me, but I seem to remember the A3000 having multiple fuses on the motherboard and I'd assume the A4000 is the same. They don't don't look like your typical glass tube fuses, so a service manual to reference would be helpful. I'd also suggest testing power supply voltages.

Just a thought, sorry I don't have more to add at this time.

[Splurge]

Well, still no luck.  Tried an old Rev9 Buster and it still wont recognize any expansion cards.  Other than the daughterboard, I'm out of ideas.  I swapped the 7407 chip on it and checked the autoconfig traces.  Anyone have a daughterboard I could borrow or buy?  I'm beyond frustrated now.

[Splurge]

Changed the subject of this thread.

Well still no luck.  Replaced both the 7432 and 7404 ICs on the daughterboard.  Checked all the traces and everything seems to be fine on the daughterboard.

Followed this writeup and still nothing is recognized.
http://www.wonkity.com/~wblock/a4000hard/excrdnot.html

Anyone have a similar problem?  The 4000 works just fine otherwise.  Swapped Busters, cleaned contacts, checked voltage...  Is there any other chip I should look at swapping?