Not familiar with the S80 but a factory reset is usually done by holding the most RIGHT key down when you power up the keyboard.
Your manual should tell you how to do it anyway.
If you lost yours go to:
www.yamaha.co.jp/manual/english/index.php
Type in the appropriate box S80 and you can download one in PDF format.
Give this forum feedback please if this helped you so others can benefit from the info.
Regards
Dick Rector
Bali (Indonesia)
Oct 10, 2009 Rating
Yamaha s*0 Reboot by: Anonymous
Dear Johnnie: I believe what you mean by reboot is what is known in Yamaha "Parlance" as "Initializing". If so: 1) The Simple reset occurs any time the unit is turned ON [if no settings were saved originally]. 2) If any settings were saved, including User Songs, initializing through “highest C method” will erase them. [Turn the keyboard ON while holding down the highest C note to the right]. 3)“Total erasure-returning-to-factory-condition” will occur if initializing is done using highest C plus three black keys of that octave. [Turn the keyboard ON while holding down the highest C note to the right, plus the the three black keys of that octave]. Hope this helps, and if it does, please post a follow-up message in this Forum so other members can follow your example. Good luck.
Jul 11, 2010 Rating
reboot failure by: Anonymous
I did this and now all of the keys are producing the same tone... ug my little boy got to the keyboard. I really need to know how to rest to factory settings...
