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Ahhh darn these schematics.. thanx

I've found a transistor in the ADB circuit thats corroded away, schematics says it's a MMBT2904, I can't find any for sale.. Does anyone know what a suitable replacement would be?

Thanks for all the advice, at least I've a starting point where to look. Cheers

Tried both ram banks.. 4 of the 8 simms were giving death chime so swapped em all around to check all the slots worked with the good ram. I tried a bmow rom simm and same thing. I dont even get a mouse pointer or rounded screen edges.. i waited 10 minutes, none of the ics are getting too hot.

It does the same thing with or without a hard disk or bluescsi connected to the internal bus. I dont have anything connected to the external scsi.. dont know how picky the iifx is regarding termination but its not even getting to the question mark or rounded corner screen.