towliang

My radio was on and off while driving so i wanted to check whether the connection was loose. I was trying to take out the headunit and half way thru I put out the Panel and got stuck halfway. Realising I have unscrew the wrong 10mm bolt so i put everything back.In the end, I could not turn on the power for the audio. Everything went blank ( no audio, no lights, no LED display, climate control no working ) only the fan **** is working. Sigh.. Any idea could i have broke the PCB for the audio? Or any ideas how much does it cost to change the PCB :D

Lost of thoughts.. Pls advise.. Tks for the help :D