My PB G4 Turns on and the HD Spins and the Start up sound comes on but the screen is blank and then a flash come on then goes out Please Help

My PB G4 is full charged and when i go to turn it on The HD spins but and the Start up sound Verifys that it came on but the is nothing on the screen untill a flash of white square like appers on the screen for about half a second. I don't Know whats wrong
It is a PB G4 with a 12" Screen

See this Apple note on booting and video issues.

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Hi there....thanks for the reply post and sorry to see you are having similar issues.
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Hello, djernigan.
Thank you for visiting Apple Support Communities.
When experiencing issues restoring or updating an iPhone, here are the best articles to go through. If you received a specific error number when restoring, see the section labeledGet more help in the second article below.
iOS: Unable to update or restore
http://support.apple.com/kb/ht1808
iOS: Troubleshooting update and restore issues
http://support.apple.com/kb/ts1275
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My PB G4 Turns on and the HD Spins and the Start up sound comes on but the screen is blank and then a flash come on then goes out Please Help

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