I just bought a corolla 07 2.0D Saloon. It contains the kenwood deck with cd and cassettes both. Its not giving the power it should.. And the back speakers wont working. I opened the whole panel and attached the wire that was not hooked to the speakers. Now when i turned my System on the error comes PROTECT. I have searched on internet and people were saying that may the deck was warm or the fuses , speakers damaged. What should i do now ??