System error when i turn on my phone.. there will be appear in my screen system error. how do i fixed it?

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Try reseting the iPad by holding the home and power buttons simultaneously until the iPad completely shuts down and the Apple logo appears.


Once the Apple logo appears you can release the buttons. If this does not work, you may need to connect your iPad to your computer and do a factory restore using iTunes.

update ur phone software ....

Hello
Try this.

The code itself will appear on a customer's screen usually after firmware is upgraded. The screen will become blank with a message of "Error 003: unauthorized device has been detected". The system also notes the error is due to memory, data, or save related issues and provides a phone number to call for assistance.
There is a technique one can use to try to "break" back into the system. This may be accomplished by holding down the reset button while at the same time turning on the power. A menu should appear on the screen with an option to run a brick safety program that can restore device functionality. Keep in mind, though, that this has only worked with modded consoles

Push in the tiny reset button on the device. If that doesn't fix it, install the latest firmware from Philips.com

if you have restore cd's I would just restore it to the factory settings to see if this helped. If it doesn't then I would test the hard drive next to see if it has gone bad. Just remember that when you restore all documents, pictures etc will be gone