G4 Gigabit with Radeon 7500 blue screen

S

Silverblade

Registered
I have a G4 Gigabit Ethernet PowerPC 400Mhz with an ATI Radeon 7500 32MB AGP that I've been trying to get to run properly.

No matter what version of OS X I've tried I have the same problem. It'll load and install just fine, but after it restarts, and shows the apple logo, when it comes to where the login screen should appear I just get a blue screen and it stays there.

I've done all the basic troubleshooting and the only times I've gotten past the blue screen is in safe mode. I remove the graphics card drivers and after that It'll work just fine in normal mode but without graphics acceleration.

The funny thing is my G4 has no problems when running OS9 or any flavor of Mac Linux.
 
Sounds like it could be the video card. Is there any fans on the card that are supposed to be turning and not turning so the card gets hot and freeks out? How about reseating the video card. Maybe try zapping PRAM and see what happens. Is there enough RAM in the machine?
 
Is that the factory-original card? If not, try replacing it with the stock video card that came with the computer... if no blue screen then, then it's likely the 7500 that's causing the hang.

You can also boot in "verbose" mode, which bypasses the fancy aqua scrollbars and Apple logo and displays the raw UNIX boot text. You could then see what step in the boot process it's hanging and perhaps get more information about what's hanging it.

Here's how to boot in verbose mode:

http://support.apple.com/kb/HT1492
 
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