Likely a blown fuse somewhere? Comms shouldn't stop on account of a wrong bulb. In fact, it should still communicate the problem with the bulb to the other relevant systems. Unless the high-wattage bulb overloaded and popped something which then caused the computer(s) to not receive power.

I agree on the two points raised:

1. Don't change anything unless you've done the research and know exactly what you're doing, and
2. Installing a wrong bulb should just simply pop a fuse and raise a fault condition. It shouldn't kill the computer(s). If it did, it wasn't designed as well to be fault-tolerant. The computers can apparently dish it out, but not take it. lol