I've had the same issue with a 2560p, although I'd rather describe it as annoyance then nightmare. It didn't cause any issues with windows for me, just that I had to hold down the power button nearly every time on shutdown. Either way thanks a lot for figuring out what the exact cause is and how to fix it. I didn't feel like cutting the small lead (and risking to damage something else while trying) and instead went ahead to isolate the sata connector itself. Cutting a thin piece of tape (transparent tesafilm in my case) and putting it over the connector pin works fine so far.