you have killed your ICM or Coil

doind a compression test results in the leads being disconnected and the coil producing spark while you are cranking. This unloaded energy kills the coil from time to time.

if this is the case, then ist a bit of bad luck for you, to prevent this you should have disconnected the dizzy during the compression test then reconnect the dizzy, then reset the ECU after you have compleated your compression test.

good luck wiht it.