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A1013、A1052、A1085或A1107/1440x900屏幕分辨率

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Why is the boot screen blank?

So I’ve worked on several Macs over the years and I’ve never seen this before and can’t figure it out. I have a 17” PB 1.67. It works fine, but there is no boot screen or chime. It’s blank like what you would see when you have a non flashed graphics card in your Mac Pro. I’ve done all the normal resets and key combinations. I’ve even booted into open firmware and did the reset-all command which I only know worked because the Mac rebooted. Any thoughts? Something I can key into the terminal to bring back the Apple logo? I’ve erased and re-installed OS X as well. Anyone else seen or fixed this?

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Your facing the dreaded dead PRAM battery issue!

Follow this guide to get to it PowerBook G4 Aluminum 17" 1-1.67 GHz PRAM Battery & USB Board Replacement which is located under the optical drive.

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Dan, I will check that PRAM battery. Thanks! I probably wouldn’t have thought of that since it held the time and date with the main battery out and it’s the only thing I haven’t done.

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Have you checked the battery? Or there is something wrong with some certain apps.

This page may be helpful: https://www.minitool.com/data-recovery/f...

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