Поместите app.routing.module.ts
{useHash: true}
@NgModule({
imports: [RouterModule.forRoot(routes, { useHash: true })],
exports: [RouterModule]
})
по-другому
import { bootstrap } from "angular2/platform/browser";
import { provide } from "angular2/core";
import {
ROUTER_PROVIDERS, LocationStrategy, HashLocationStrategy
} from "angular2/router";
bootstrap(MainApp, [
ROUTER_PROVIDERS,
provide(LocationStrategy, {useClass:HashLocationStrategy});
]);