No boot: blank screen with backlight and motorola logo loop - Motorola Droid and Milestone Q&A, Help & Troublesh

the phone does not turn on, stays in the loop motorola logo and does not turn on the device.
the power button not working.
since i got the phone (used), no longer had boot, but worked normally after having applied an update.zip by one recovery reboot apk, he started getting looped on motorola logo
android 2.1 i think
any ideia? tks!

ok, i fix it.
the problem was the power button aways pressed. because that, i cant get on boot scrren! ^^
tks!

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