I had to replace clutch on my Lexus IS300. When i was picking up a car i couldn't start it. Shop owner brought in a portable battery, connected to my battery and powered me up. Battery seems fine since then. All electrical functions are ok, except the entire Audio System, receiver and CD Player, are dead. No lights, no movement, pushing on/off button does nothing at all.
What could cause this ?
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How can this be fixed ?
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Please help...