No power to head unit - Audio Players & Recorders

If your Alpine INE-S920HD head unit keeps shutting off after a few minutes of starting the truck and your backup camera appears dark, it could indicate a power or wiring issue. Here are a few steps you can take to troubleshoot the problem:
Check the power connections: Ensure that the head unit's power and ground connections are secure and properly connected. Make sure there are no loose or damaged wires. Check the fuse for the head unit to ensure it is not blown.
Verify the power source: Confirm that the power source you are using for the head unit is stable and providing sufficient voltage. Consider checking the vehicle's battery and alternator to ensure they are in good working condition.
Inspect the wiring for the backup camera: Check the wiring connections for the backup camera, including the power and video cables. Ensure that they are securely connected and not damaged. A loose or faulty connection could cause the camera to appear dark.
Adjust camera settings: The dark image from the backup camera could also be due to incorrect camera settings. Check the settings menu on the head unit to adjust the brightness, contrast, or other image-related settings for the backup camera.
Reset the head unit: Perform a factory reset on the Alpine INE-S920HD head unit. Refer to the user manual or contact Alpine customer support for specific instructions on how to reset the head unit.

1. Verify the Unit Isn't in Protect Mode.
2. Check the Fuses.
3. Check the Pigtail Connector.
4. Check for Power at the Head Unit.
5. Check for Ground at the Head Unit.
6. Bench Test the Head Unit and Replace if Needed.

Can a head phone be plug into the unit and if so - can you hear sound over the head phone. Also first look if nothing is stuck in the head phone jack (where it is plugged in as kids tend to stuff small objects into it). If sound can be heard over the head phones the unit is ok. The problem then lies with in the speaker output circuitry. The speaker output wiring has most of the time a inbuilt fuse that protects the circuitry when the speaker wires are shorted out when power (volume) is on. The unit has to be opened to replace it by a knowledgeable person.

Check to see if you are getting power to the head unit. If not then there may be an internal fuse in the head unit.

When a head unit doesn't remember settings like yours, then the Yellow constant battery wire isn't hooked up correctly. This wire provides power to your unit constantly from the battery so that it can remember the settings and such. Your aerial not going up is the Blue power antenna wire. This wire will provide power so that when you turn your unit on, it powers the antenna to go up. Hope this helps!

There is an internal relay that switches the amplifier remote turn on from ground to 12VDC when the ignition (ACC) wire is applied power.

The internal relay (inside the radio) is faulty and must be repaired.

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If your head unit powers off at high output it could be several things.
1. check ALL your grounds (head unit, amp, etc..)
2. it could be a a short.
3. head unit could be defective

disconnect the amp power/signal and see what hapepens.
If it doesnt happen you probably have an open ground or short in your amp power or signal cables. Amp could be defective but that is unlikely

If it still dies when the amp is disconnected it is isolated to your head unit. Check your head unit's ground/power/fusing or swap in another head unit to eliminate wiring faults.

Good Luck!

Check the fuse on the control board inside the head unit,if its ok you need to replace the contrl board

Yes, and would imply that the amp is powered up all the time.

You should correctly wire your system by

1.Connecting the constant 12vdc input wire to a constant 12vdc source to power the in-dash head units memory.

2.Connecting the switched 12vdc input wire to a switched 12vdc source to power the head units primary functions.

3.Connecting the remote output wire (typically a blue wire) from the in-dash head unit to the correct terminal on the amp, so the amp will only power up when the head unit is on.

4 Remember to run the signal (speaker) wires in a chase separated from the amps power wires, so as to avoid a buzzing noise in the speakers.

5. Always use an in-line fuse on the amp and the head units main power wires.

Note: A properly powered amp will produce a better sound quality then if it were under powered, so be sure to use the proper wire gauge as your amps power supply.

Good luck
Aduz

your amps rem wire is hooked to the power antenna wire on your head unit and so when you turn off the radio you would nolonger need an antenna so it powers down and would lower the antenna.Depending on the head unit you should have one output for the power antenna and one for the amp rem......If your head unit doesn't have the rem output you can wire it to the switched wire that powers your head unit but keep in mind the amp will stay on while you have the key in acc or run position even if your head unit is off.
hope this helps!