Every time you open a new post (5 and counting at this point) you slow down their response time. Respond to your original thread (either this one or via email, whichever you did first) instead of starting new ones.
If it’s your power supply they need to verify stock, and get a shipping label set up so you can return your machine. They are likely doing everything in their power to figure out a way to fix your machine without you having to ship it back. They are concerned, as evidenced by their top-notch CS over the past 4 years, but they can’t make it go any faster and if they have to continuously find/close duplicate posts it slows them down.
It’s frustrating, but you should use this time to find a back-up option in your area. They will respond as soon as they have new information.