2005 Honda Accord electrical problem

Hi guys, So the situation is my car's dash lights and stereo and windows like to turn on and off by themselves without the key in the ignition. On Off On Off flickering like that intermittently and It is kind of unnerving and weird. As well as my stereo making a pop sound then the sound disappears altogether even though the stereo is still on or the CD is still playing, yet the sound goes off. Sometimes powering the stereo on then off makes the sound come back but it's a matter of time before Pop and the sounds gone again. I suspect it could be faulty wiring. Please, any inkling of what might be going on would be greatly appreciated. Thank you in advance.
Steve.