Plot hole: The demonstration to the Board of the system's potential is ported through acoustic modems. Even in those days (early 1980s), anyone would have realized that the bandwidth simply wasn't possible at 300 bps.
Plot hole: During the supercomputer's destruction, the 3 electrical probes that are sending lightning to the overhead pylons to draw electricity from them are no longer flashing. So where is the electricity coming from to sustain the computer's lighting system as the fluorescent tubes are still working?