Stereo problem with hyundai sonata 2000 after dead battery

The stereo is needing a code to put in before it will work. It should be in the owners manual. If not, you will have to check with a dealer who may provide a code for a small fee. You will need proof of ownership of the car.

o my word if you got petrol and spark it sould start,but if you jump start it you might blow the computor

it can be a number of problems one can be you have something is staying on it can be a light in the boot,you alarm is wired wrong or a radio is not off or it can be the battery no good. By jumping the car with a jumper leads can damage the battery, or you alternator is not charging good. First to check your alternator you will need a volt meter and place the negative from your meter to the negative of the batter and the positive to the positive and start your car. If the reading is 14.3 V to 14.8 V your alternator is good than the problem it can be any of the other things that I indicated

check to see if getting spark or fuel if no spark could be crank sensor or cam sensor have to check voltage out of wiring harness if low voltage ecm bad. Pull both coil wires off coil and have someone turn ignition no spark probably ecm. For fuel check number one plug see if wet and also listen when you turn key for fuel pump. If driving it just died on ya and battery went dead like know and you tried jumping or replacing battery.Still would not start ecm bad.

Poor connections at the battery cables to the battery

ensure no wires fallen behind battery that u have missed if non genuine stereo.if fuses not blown it sounds like u have cooked it. this occurs from a spike or reverse polarity of the battery or jump cables

Will the wipers work with the key in the run position? If not, it's the battery. Try a jump start. If the battery's ok you need to measure volts and amps at the starter to check for clean connections and internal failures.

it does sound like a fuse problem. make sure the fuse you replaced did not blow again. the radio will have two fuses for it , one ignition fuse to make it work and a permanaent supply fuse to keep the memory when you turn the car off. i would check all the fuses, even tho they look good they could still be blown. best way to check them is to turn the ignition on and with a 12 volt tester go across both sides of the fuse, the tester should work across both sides, if it only works one side it heas blown. just a thought in regards to the battery change make sure all the cables have been put on correctly, none left or on wrong side. hope this helps.

well then I would disconnect the power to the alarm

a can be the altenator