IIci Nubus troubles

[beachycove]

A IIci in my depressingly large stack-o-macs does not recognize any Nubus cards — working video cards, for instance, have no output when installed.

I took a look at the machine today. A few months ago I had had a quick go at rehabilitating it. The caps had leaked so badly that the machine would not boot, and so the logic board was washed and dried; no caps were replaced, but at least the machine will now boot every time you try into 7.1. Today, while rummaging around and re-organizing my storage, I also swapped the power supply in this particular IIci for a known-good one from a IIvx, in order to try some cards in the Nubus slots again. Alas, I still have a no-Nubus situation.

I can do rudimentary soldering with the best of them, but am not trained in electronics at all, so I ask here: Could bad caps prevent sufficient power from getting to the Nubus slots, so that they do not work, or is it possible that I have a dead Nubus controller on the board meaning that is not worth going to the trouble of re-capping the machine?

 

[Unknown_K]

Do any of the main chips look gunked up?

Could be all kinds of things wrong you need to be more specific (does it bong, do the drives spin up, check for voltages, etc).

 

[Bunsen]

I assume you're also installing drivers for these cards, right?

 

[beachycove]

The machine bongs and works normally apart from the Nubus slots, except that it boots irregularly when there is a card in one of the slots. It has not been tested extensively, however, as it is still in the "to do" pile. The question is what is to do.

The board was well cleaned so the chips should be good to go, but you make a good point; maybe a second cleaning would clear this up. For their part, the Nubus video cards do have accompanying extensions, but give video output at 640x480 in other machines without any add-ons. Should work in the IIci.

But my question is still unanswered: can bad caps cause Nubus slots to be non-functional?

 

[Unknown_K]

Battery leaks can break traces causing all sorts of issues. So can washing a board without drying it 100%.