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If it got wet it might still be wet from the inside and that is why your touch screen wont work, You would need to open it and clean it from inside. Or it could have a bad digitizer and that is a second reason why the touch screen wouldnt work. You can try doing a hard reset if you says it just shows a triangle on the screen.
Turn the G1 off. If it’s frozen on, take the battery out and put it back in the unit.Hold the Home and Power keys down at same time for about 25 seconds. You will see a yellow triangle screen with exclamation point in the middle Now to wipe the device clean: Press Alt+L. Press Alt+W for a factory reset. Press the Home and Back keys again for about 25 seconds. The device should then reset again and the hard reset is complete.
If it keeps rebooting itself at the G1 and Android screen, you might want to factory reset the phone and clear all the data as there may be a virus. To do this, when turning on the phone, hold the home button and the power button even while the G1 screen comes up. Keep holding these until an image with a triangle comes up. You will then wait 5-10 seconds, and press the home and power button again together. This will bring up the OS screen, and provide you 4 options. One of these options is to wipe and restore to factory. Do this and your phone should work fine after you reboot again.
If your T-Mobile G1 Google smartphone is not responding or is frozen, you may have to opt for a hard reset. Here’s how:
1. Turn the G1 off. If it’s frozen on, take the battery out and put it back in the unit.
2. Hold the Home and Power keys down at same time for about 25 seconds. You will see a yellow triangle screen with exclamation point in the middle.
Now to wipe the device clean:
3. Press Alt+L.
4. Press Alt+W for a factory reset.
5. Press the Home and Back keys again for about 25 seconds.
The device should then reset again and the hard reset is complete.
I solved this problem by booting into SAFE MODE on the G1:
Press Menu Button and Switch on the G1 Phone using Power button. (Do not release menu Key).
That Got it to turn on. but upon power down it did the same thing with blue light. So I always start in SAFE MODE. I will start uninstalling programs until i find out which one is causing problem.