Yamaha Synthesizers presence on the "Believe In Music" site has a link to "Livestream Schedule". It gets a 404 error. I can understand not wanting to let cats out of the bag - but if that's the goal, there should be a "stay tuned" kind of landing page instead of a 404 error. Other links go to the countdown timer and generic "making waves" animation. That'd be fine.
Note that the broken link is hosted by yamahasynth.com - which is why it's appropriate to mention here.
This is the full link: