If your Samsung device is stuck in a dead boot state or is bricked, there are a few steps you can take to try and repair it. Here are some methods you can try:
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Soft Reset: Try performing a soft reset by holding down the power button for 10-15 seconds. This may help to restart the device and fix any software issues causing the dead boot.
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Recovery Mode: Boot your Samsung device into recovery mode by pressing and holding the Power, Volume Up, and Home buttons simultaneously. From there, you can try wiping the cache partition or performing a factory reset to fix any software issues.
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Odin Mode: If your device is still not responding, you can try entering Odin mode by pressing and holding the Power, Volume Down, and Home buttons simultaneously. From there, you can use Odin software on a computer to flash the stock firmware onto the device.
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Visit a Samsung Service Center: If none of the above methods work, it may be best to visit a Samsung service center or contact Samsung customer support for further assistance. They may be able to repair the device or provide a replacement if necessary.
Please note that attempting to repair a dead boot or bricked Samsung device may void the warranty, so proceed with caution.