Glossing over the TDA rules, I don't see a rule that covers this, except Rules 1 and 2.
Significant action would be a raise followed by any action. Calls and/or folds are not significant. It sounds like you're asking it merely posting the wrong blinds and dealing cards is significant. Absolutely not.
Here's how I would rule on this:
If the error is not discovered before the flop or significant action, the remainder of the hand plays at the prior level.
Otherwise, the action will be backed up. First, the blinds are corrected. Callers will have the option to call the correct amount, or fold, getting their chips back. They will NOT have the option to raise (unless the action comes back around to them). If the raise amount is more than the correct BB, it will stand, or be increased to a valid raise. If the raise amount is equal to or less than on BB, it is assumed that he is first putting out the call amount, and hasn't declared his raise amount. He will have the option to raise to any amount.
Bottom line, players need to be aware of the action and blinds, and must not rely upon the dealer to catch mistakes before the action begins. This comes from Rule 2, Player Responsibilities: "... follow the action ... speak up if they see a mistake ..."