Question about Samsung SGH-d407 Cellular Phone

2 Answers

No response from keypad input?

My sgh-d407:
-Turns on via the normal power button
-Boots up, and from there, refuses any input from sidekeys OR the normal full keypad.  The only way to shut it off seems to be to remove the battery.
-When I open the phone, the screen and keypad light up, but no matter what I press, eventually go back to sleep as if I weren't pressing anything.
-When I get a call, I can open the phone and talk to the person, but I can't terminate it with the 'end call' button, or do anything with any other buttons, for that matter.

I'd think it's a hardware problem with the keypad, except that I can power it on with the normal red power button.  I'm thinking maybe it's a firmware problem; is there any way to hard reset it?  I've tried removing the battery for several minutes, with no change.

Posted by Iluvatar on

  • 4 more comments 
  • Iluvatar Oct 26, 2007

    Also, I should mention that the screen is not frozen, since the animated background is working.

  • Iluvatar Oct 26, 2007

    I checked for stuck keys; there doesn't seem to be anything physically stuck about them, and they press fine.

    As for opening it, all I can do is take off the back and remove the battery.  To do more than that requires a very small screwdriver.  I work in IT and I don't have one that small on hand.  :/

    Further, because it responds to the power button (the end-call button) before it's started up, but not after, I don't know if it'll be a hardware issue.

  • Anonymous Jan 26, 2008

    Exactly the same problem. Started spontaneously while in a vehicle. Called AT&T who were no help at all.

  • Anonymous Sep 29, 2008

    same problem

  • stjoedude04 Oct 19, 2008

    i have this same problem

  • Anonymous May 10, 2009

    I have the same problem.



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Had the same problem and fixed it this way removed the battery and sim card. Put the battery back in and turned the phone on. You get a message "Insert Sim card". Remove the battery and insert the sim card. This resolved it for me

Posted on Apr 06, 2010



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Check your volume keys or any side keys that get stuck... or if you can open your fone check its keypad for any shortage...

Posted on Oct 26, 2007


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