IIRC, for FXtender the Falcon clock traces were heavily modified. Check that the "clock separating resistors" R216, R217,
R221 and R222 are restored correct. Also lift and re-seat the chips U62, U63, U67 and U68 to make sure they all have
correct contact. U24 (near midi port) and U52 (right beside fan) were modded, too, right? -->check
If your multimeter supports frequency measurement, you can find the 16MHz at every contact of the resistors above.
With Falcon powered OFF, you should also "beep" (contact test) the clock traces from the above resistors to the
"clock receiving chips".
joska wrote:Yes, check the 500KHz baud-clock to the keyboard- and midi-ACIA (U24 and U52). From my own experience I can say that a missing clock here results in an apparently dead Falcon. I had the exact same symptons as you describe with my first Falcon which had a Speed Resolution card with what turned out to be a broken 500KHz clock.
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