My 99 honda civic ex won't start up the car just turns over not slow or bogged down sounding either.. I just installed a after market stereo and since then it won't start I tried unpluging the power supply and still the car won't start.. how can I fix this problem?

Test all under hood and under dash fuses with a test light or multimeter:

https://www.askmehelpdesk.com/cars-t...tml#post252145