Does this repair "guide" work?

After 11 or so years of use and enjoyment, my S750 speaker system would no longer turn on, but I've tested the speakers themselves and they still work. It's the integrated sub-woofer and power supply unit that has gone down. After a good amount of searching for possible replacements and finding none to my satisfaction, I searched even more and found what appears to be a repair guide: https://forum.lowyat.net/topic/2873671/a...

Has anyone tried this and can verify the accuracy of what's posted in the forum link?

Creative GigaWorks S750 7.1 surround speaker system