[Raro]

Could it be something like "failure is the mother of success"?

(失败乃成功之母)

I am no expert, I was curious myself and went down an internet-sleuthing rabbit-hole. Apparently this is a common phrase, but I am not fluent in Mandarin, so cum grano salis.

[jxramos]

That sounds like a close cousin for sure. It’s hard to tell because it was in English but maybe the Chinese was in small script below. I don’t know if I still have that manual either, it may have been destroyed in one of these boxes that got left out in the rain. I’ll try to look for it next time I’m digging around the attic.