When I turn the receiver on, it suddenly turns off after only 4-seconds. Advice?

To reset a Sony STR-AV480 receiver, you can follow these steps:

1. Turn off the receiver.
2. Press and hold down the power button on the front panel of the receiver.
3. While holding down the power button, press the "Enter" button on the front panel of the receiver.
4. Keep holding down both buttons for a few seconds until "Clearing" appears on the front display panel of the receiver.
5. Release both buttons and wait for the receiver to turn off.
6. Turn on the receiver and it should be reset to its default settings.

Note that performing a reset will erase all custom settings and return the receiver to its factory default settings. If you have any custom settings that you want to keep, make sure to write them down before performing the reset.

Key switch ? key fob ? Transmitter Programming ?
If you lose a transmitter, program the old and new transmitter(s) into the remote control door lock receiver's memory. Up to 4 transmitters may be programmed.
Important: Once the remote control door lock receiver enters the programming/diagnostic mode, the programming of the first transmitter erases all previous transmitter programming information, requiring the programming of all transmitters.
Program only 1 vehicle remote control door lock receiver at a time. If more than 1 receiver is being programmed at the same time, it is possible that the same transmitter could be programmed to more than 1 remote control door lock receiver.
Perform the following steps in order to program the transmitter:

1. Remove the ignition key from the ignition lock cylinder.
2. Remove the BCM PRGRM fuse from the fuse panel. Refer to Fuse Block in Wiring Systems.
3. Close all of the doors.
4. Close the lift gate.
5. Turn the ignition lock cylinder to ACC.
6. Turn the ignition lock cylinder to OFF, and then back to ACC within 1 second.
7. Open and close any vehicle door.
A chime will be heard when the system enters the BCM programming/diagnostic mode.
Important: After 7 seconds, a chime may be heard confirming successful synchronization. It is necessary to wait approximately 14 seconds for a second chime that will confirm successful programming.

8. Press and hold the transmitter LOCK and UNLOCK buttons simultaneously for 14 seconds.
9. Repeat the previous step on each additional transmitter to be programmed.
10. Remove the ignition key from the ignition lock cylinder.
11. Install the BCM PRGRM fuse back into the fuse panel. Refer to Fuse Block in Wiring Systems.

Not sure what the problem is but I have exactly the same fault with mine. Apparently it's either going to be the inverter, the magatron or both. Cost approx £120 inc callout.

My advice: Get a new one!

go to tom tom home and they have a new download that should fix it.

if remote is good here are the factory instructions to program it, if this doesn't work u may have a bad remote or receiver in car.

1. Start with the key out of the ignition, drivers door is open all others closed and
drivers door is unlocked.
2. Perform these steps within 5 seconds.
A. Insert the key into the ignition(Do NOT Turn) Pull key out.
B. Insert the key into the ignition(Do NOT Turn) Pull key out.
3. Perform these steps within 40 seconds.
A. Close then open the drivers door.
B. Close then open the drivers door.
C. Insert the key into the ignition(Do NOT Turn) Pull key out.
4. Perform these steps within 40 seconds.
A. Close then open the drivers door.
B. Close then open the drivers door.
C. Insert the key into ignition and leave it in ignition.
D. Close the drivers door.
E. Turn the ignition to ON (Do NOT Start) then back to OFF.
F. Remove the key from the ignition.
5. Within 3 seconds, the power door locks should lock then unlock automatically
indicating successful entry into programming mode.
Return to step 1 if the locks do not cycle at this point.
6. Perform these steps within 40 seconds.
A. Press the lock and unlock buttons on the remtoe simutaneously for 1.5 seconds.
B. Immediately after letting go of the lock and unlock buttons,
Press the lock button by itself and hold for 2 seconds. Within 3 seconds, the door
locks should lock and then unlock once indicating successful programming. If
the door locks cycle twice, repeat steps A and B in step 6 as the remote was
not accepted.
C. Repeat steps A and B in step 6 for each new remote.
7. Open drivers door.

Have you tried doing a hard reset,try using the reset button on the bottom of the gps under the serial label.Or try holding the turn off button for about 10 seconds,good luck.

the amplifier is seeing a short,or the internal components like one of the output ic are causing dc to show at the speaker terminals.the speaker protect is causing it to shut down.

Just a suggestion, make sure the power outlet/s is grounded and that the polarity on both plugs are correct.

Tan Orexic

The space you have provided should be enough. If this is a new unit and still under warranty, I would request warranty service. It sounds like the unit is entering protect mode. This may be due to heat or it could be because of a defect in the protect circuit. In any case, this should not happen that quickly.

Update this if not under warranty and I'll provide a list of diagnostic tests to help determine the problem.

Dan