> All I've done is replace the original CF745 that had the
> code I don't like with a 16F628 with my code. 

The 16C745 has a max Vdd of 7.5V, so it wouldn't have
died at 7.3V. It has a working Vmax of 5.25V, less than
the F628. Pretty poor design to expect it to work properly
unless the majority of LEDs were on to get Vdd down

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