Some further questions to help narrow it down:

Is the main and the prerinse supplied by the same pipe?

If so, there is still the chance that sediment sitting in the pipe could have loosened and blocked both.

Was there any soldering involved? Sometimes if the joints/ valves are over soldered, the excess solder can block either one.

Is the hot and cold water not flowing?

O.K. do not worry; I'm going to get you through this.

It is still possible that some deposits have broken free and have plugged the faucet. The passage galleys of most faucets are actually very small. I would pull the cartridge out and check it.....it may be clogged. Turn water on without the cartridge to clear the supply lines. This will also tell you right away, it the cartridge is the culprit, since you will have water flowing at this point.

Great....I'm glad you found the problem.

Thanks for the Accept and please leave Feedback.

Have a great night.