Aiwa Z188 surround speakers busted

Gud day Sir,
My Aiwa surround speakers busted, what seems to be the caused of this burnout speakers.
Except for the main speaker all the three small speakers busted. Also FM tuners seems not properly aligned.
Example FM is tuned in 95.5 sound is weak but if you scroll it to higher or lower frequency say 95.2 or 95.6 it becomes louder than the 95.5.
What seems to be the problem.
Kindly help us with the above problem.
Thank you in advance. Raul