Help with speedo cluster
 

So I replaced the cluster with a used one because the tach had quit and now the car will not start and the theft deterrent light is flashing fast. Any help??
Thanks!

The immobilizer runs thru the instrument cluster. You will need to refit the old cluster, drive it to Mazda for them to reprogram the replacement cluster to the system.

So there is no way to bypass the immobilizer?

No, you cannot.