My Punto 90's HU has stopped working - There's no sound whatsoever except a very low-volume noise. This happened last week - the sound disappears, I can hear loud crackles, and then the sound comes backs at a very high volume. But that was the last time it worked. Dead since then. Have disconnected the amp thinking that might be the issue but that didn't help Is there any place in Noida / South Delhi where I can get this checked before I give in and buy a new HU? Apparently, there's some place in CR Park or GK2 worth trying... cheers..