Lenovo — even lenovo technician can't guarantee motherboard quality of ideapad 330

Last week all of the sudden my laptop stopped working, something called no power issue. I registered my complaint in lenovo, technician came yesterday to fix the same. Then he asked me to upgrade my warrenty as he said motherboard issue is common and may occur again, i asked if there any permanent solution for this then he said there is no solution motherboard does get damage in certain period of time. Is this the quality you are providing? Before this laptop i was using dell, to be honest i have used it very roughly but i didn't have to use my warrenty at any time there was no issue at all, that is something what we call it quality. Your technician can't guarantee how long motherboard (Which was replaced by him only) will work, what else can i say. I need explanation