I'd try the 1.3 ROM to test... I'd assume Wicher only needs that to actually boot from IDE. The RAM & turbo will still work fine.
As a test, if you enable everything on the jumpers and it gets to the 1.3 boot screen (which it should) then you know it's a problem with 3.X.
The other thing I'd try is removing your chipram expansion and see if that helps when trying to boot your 3.X config.
Basically just belt & braces troubleshooting - go back to the bare machine and try things one at a time until more information presents itself
