hello there..
i recently repaired 1 unit Logitech Speaker Z906,
the Power Board is the main problem, i able to modify the board circuits.
and now it power up again,
i repair this unit for a friends who love this speaker.
PM me if you really like to repair this Z906 Speaker.

Thanks

Services Noticeboard this way ----->

Hi boss i am interested to repair my Z906, power board i suspect. How do i get in touch with you?

The most common problem with the Z906 power supply module is six resistors 3.3k ohm which always burn after a year (maybe design to demolish itself after warranty🤭) and it can also carry with it the PWM ic section and components.. and most repair shop in malaysia dont want to pening😂 tracing the fault due to SMD components and no schematic available.. for those who really really want to repair, u can send it to one indo guy at bogor.. TT "Warsinoservice".. only send the power supply if u know how to open and disassemble. im also planning to send mine.

meaning u replace the whole power board section for supplying +46v +12v +5v +3.3v ?

You should go ahead with the repair, all the online resources point to it being a relatively straight-forward repair. Looks like even I could do it