Hi, When testing my spare logic board for my Mac IIFX, I found it refuses to power on pressing the startup button on the keyboard. The keyboard ( incl cable), the PSU, both Pram batteries and the 2 Nubus cards ( video and network ) are fine as everything works well on my original logic board. I fully tested the PSU and it's fine: all measured voltages are within specs. I can get the Mac IIfx booted with the power button at the back but never with the startup botton on the keyboard. It's also not running stable as sometimes it doesn't find the hard drive for boot or I just get nothing ( no startup bong eventhough powered on: black screen, no error or Sad Mac ). The only difference I see between both logic boards is that the "problematic" one is the version with lots of SMD 47uf - 16v capacitors so I replaced them all with the same result. Anyone an idea what else I can do or try or what''s wrong ? Thanks, Nico
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