logitech x540 internal problem

[intafocus]

hi after waking up this morning my logitech speakers would not get any power when i clicked on the remote. I tried several different outlets, and think that because i ran my portable heater in the same outlet, this prob did my damage. I opened up the inside and the fuse looks to be intact and everything else on the board seems to be fine so im assuming i need to replace the large transister on the bottom? thanks for your help

 

[intafocus]

i also have another question, would there be any way to use the logitech speakers in a home theather receiver set up?