Samsung GT-P1000 Galaxy TAB hard reset



Your device freezes or has fatal errors
If your device freezes or hangs, you may need to close programs or reset
the device to regain functionality. If your device is still responsive but a
program is frozen, close the program using the task manager. 
If
your device is frozen and unresponsive, press and hold [POWER ] for 8-10 seconds. The device will reboot automatically.
If this does not solve the problem, perform a factory data reset. In Menu
mode, select Settings → Privacy → Factory data reset → Reset phone → Erase everything.

Samsung GT-P1000 Galaxy TAB hard reset using keys 

With the Samsung Galaxy TAB turned off, press and hold the VOLUME UP button, and then briefly press the POWER button. Select Factory reset with the volume buttons.

Samsung GT-P1000 Galaxy TAB download mode



Note! This is not the hard reset method, only for P1000 flashing, P1000 software update

With the Samsung Galaxy TAB turned off, press and hold the VOLUME DOWN button, and then briefly press the POWER button. 
Samsung GT-P1000 Galaxy TAB hard reset with keys