2001 Hyundai Sonata radio has power, but display is blank

A mechanic would test the battery for a dead cell, then each circuit on the car for a voltage drain.

Dear,

this car is equipped with the electronic fuel pump.............
please check the water level of your car battery and get it recharged from the workshop and also check the life cycles of the battery....if the battery is not ok...........then please get it replaced.


hope this solves the problem

thanx

Yes, the radio might not be wired properly. Is it the stock rzdio, or was it added aftermarket. See dead battery section at link.
Do It Yourself Diagnosis and Repair

sounds like a starter. if possible without getting hurt maimed or mutilated, try tapping on the starter (best done with a rod standing beside the car) while someone holds the key in the start position. if car starts (works about 50% of the time) it's the starter. otherwise, if all lites come on, radio works, etc but nothing when you turn the key, replace the starter

i would suggest you recharge the battery overnight, this should stop the hazzard lights activating as they do when battery level is too low.

sounds like you need to replace the radio

doubtful probably burnt up a component in radio thats why when jumping a vehicle u turn off all accessories so when something gets crossed it doesnt short it out usually will blow a couple of fuses

Not the battery. Once the car is started, a bad battery will not cause it to stop running all of a sudden.
For engine to run you need - compression, air, fuel, spark.
Might want to check out your ignition coil for an intermittent condition - try replacing it.
And if it does not turn over(crank) check the wiring going to the starter motor,solenoid, for good connectivity. And make sure that your fuel pump is always getting power and pumping.

you need to go to the Hyundai service center they can reset the radio I believe this is a security feature, you may be able to call the service center to find out the procedure to reset the radio, it is the original right ?

After verifying all the connections to the radio are good (power and ground, antenna, speakers, etc), the audio unit has an internal malfunction. Solution: Replace the audio unit.