Android phone cannot press any buttons after boot My Samsung Galaxy S 4G seems to be bricked. I must have done something horribly wrong to get it to be in this state. Sometimes, it hangs on the Samsung screen when booting up. Other times, it is unresponsive after the first five seconds. I think it's the media scanning that's causing this, but I am not sure. Samsung Kies and ADB both do not detect the device. I did a factory reset when this was happening, and it seems to have made it worse. Is my phone un-savingly bricked? How can I fix it?

When the phone was still working, I think I deleted some system files accidentally. 
This could be why it's not working properly.

Edit: Now it seems like I can't even get pass the Samsung Screen.
You most likely have damage some critical files that are preventing your device from booting properly, with this in mind, you can try:
One-Click UnBrick
Credits go to AdamOutler at XDA-Developers Forum.


About One-Click UnBrick

Will work on all Samsung devices which use Odin3
Is a single, portable executable
Is the first one-click anything for our devices on Linux
Works on Mac
Works on Windows
Is open source
Is programmed in Java
Deploys and installs Heimdall for your OS
Is super easy to use.... Only one button!



Instructions

Copy OneClick.jar to your Desktop or any other folder on your computer.
It won't work on a network share.

Double click the file to run it.
As long as you have Java installed on your machine you are up and running.
Linux users:
Mark this file as executable:
chmod +x OneClick.jar

All platforms:
Double Click to run, OR, right click and open with Java, OR from command line:
java -jar OneClick.jar

Windows users:
For some versions of Windows as a work around to UAC (User Access Control, the annoying popups), a executable called &quot;OneClickLoader.exe&quot; has been deployed to the same folder as OneClick.jar. It is important that you do not rename OneClick.jar until after running OneClickLoader.exe

right click OneClickLoader.exe and select &quot;Run as Administrator&quot;
Setup should be run-of-the-mill.



Attention:
Have you tried to go back to Download Mode?

If it's still able to go back into Download Mode, you don't need this software.
Just turn your Captivate into the Download Mode and flash back to STOCK Eclair or Froyo using Odin 1 Click or whatever similar.


Links:

Click Here to Download One-Click UnBrick 10July11 from GoogleCode
You will need Java installed on your computer: Do you have java?