Can you try to tell us how you fixed it, then? You wrote "There is wrong with camera. I disable it. 3DS working. But every ico when me touch,system freeze!" so I do not understand what you did and if the system is still freezing.
I ask again: does it start up properly when the SD card is removed?
The first fault is a black screen.I removed the ribbon of the camera.
N3DS can be turned on. But the boot is very slow. The boot time is about 90 seconds.
The cursor of the game console can move after booting, and the system freezes when you open the APP.
I have always removed the SD card port for testing.
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If the n3DS boots to HOME Menu with working screens, see if the
battery trick fixes the slow load time.
Remove the battery, press and hold the (Power) button for 30 seconds, press several more times, reinsert the battery, and then turn on the o3DS without the SD card and without a game cart.
Try booting Recovery Mode, GodMode9, Luma3DS configuration, and HOME Menu.
I tryed。My N3DS isOriginal system。 Upgrade to the latest system through the recovery mode, but it does not work, it is still very slow, and then the opened application freezes in the home menu。All programs that can see the 3DS with a black background when opened cannot be opened. Will freeze in the start menu. The touch screen and buttons are disabled.