Nexus 25 freeze

hold the power on button for 30 seconds, it can reset itself.

1. Turn the power off. If your Nexus S is frozen, pull the battery out and reinsert it
2. Hold the Volume Down button
3. Press and release the Power button
4. You are now presented with a menu that allows for Fastbook, Recovery, Clear Storage, and Simlock
5. Select Clear Storage by pressing the Volume Down button
6. Press and release the Power button
7. Now simply confirm your decision: Volume Up for YES and Volume Down for NO

All data including third-party applications will be deleted from the Google Nexus S. Once the wipe is complete, the phone will reboot to its factory fresh state.


Source: http://www.thefullsignal.com/google/google-nexus-s/7964/how-hard-reset-google-nexus-s

Hi,

You may want to follow the step-by-step instructions posted below to hard reset you LG Nexus 4 when it becomes unresponsive. Please note that the phone will wipe all contents.

How to perform a hard reset when my LG Nexus 4 is unresponsive
1. Ensure the phone is off.
2. Press and hold the Volume down button and thePower button.
3. Scroll to Recovery mode by pressing theVolume down button.
4. Press the Power button.
5. Press and hold the Power button and then press the Volume down button.
6. Scroll to Wipe data/factory reset using theVolume down button.
7. Press the Power button.
8. Scroll to Yes -- delete all user data by pressing the Volume down button.
9. Press the Power button.
10. The phone will now wipe all contents.
11. Press the Power button.
12. The phone will now reboot to the initial setup screen.

remove battery, wait 5min, put it back and try long reset.

Press and hold Volume Down, and then press and hold Power simultaneously until the device turns on.

Hope that helps!

Remove your battery and reboot your phone. It is an error in the model.

1.Check the device's battery level for at least two bars of strength.
2.If the battery level is low, charge the battery.
3.If the issue is not resolved, remove the back cover.
4.Remove the battery.
5.Wait 10 seconds.
6.Press and hold the W key.
7.While pressing down the W key, re-insert the battery.
•The device restarts and after approximately 15 seconds, the 'Recovery' screen appears
•Release the power button but *continue holding the home button*, for another 30 seconds.
Step
Thanks

• Click link to read manual and do a Factory reset
• https://premanoseat.files.wordpress.com/.../samsung-nexus-s-google-phone-manual.pdf

This has happened to my radio several times after I've dropped it. This is how I fixed the problem:

1) Take the radio out of the cradle and let it play until the battery runs low and
the radio can no longer play.

2) Put the radio back into the cradle, plug in the power cord. When it comes on
the screen should no longer be blank.

Mine did that and I just futzed around with it (take the battery out, then put the unit in the charger). Stuff like that. Also watch the power supply for the charger! Mine read 5V ok until I plugged it in. Then it dropped to 4V. I bought a whole new radio before I figgured it out. (I'm using an old PC PS for the 5V now.)