Apple Event: May 7th at 7 am PT
My Power Mac G5 won't boot up, get the chimes and get as far as the Grey Screen with Apple Logo and then no further. Have run the Apple Hardware Test and it comes up with zero problems, everything passes ok. Have changed the 3.6V battery today. Have tried booting up off the original disc's but that does not seem to work?
PowerMac
Have you tried booting from the install DVD for your Mac?
Tried that but it does not boot up either. Have run the hardware test and it shows no problems
Have also tried booting up from the install disc by holding down alt key and then selecting the disc when given the option of what to boot from
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/ht1379
In fact, do 3 in a row, takes a bit of time.
How to reset the SMU/PMU on a Power Mac G5 (Late 2004) or Power Mac G5 (Late 2005) ...
http://support.apple.com/kb/HT1436
Earlier G3, G4, G5 models...
http://support.apple.com/kb/HT1939
One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive & trash/rebuild cache files
Reboot, test again.
Can't get it to boot up in safe mode either, it goes as far as the grey screen with apple logo but no moving gear showing, just grey screen with logo and then the fans start to speed up after a couple of mins. Reset SMU and have tried PRAM reset but can't get that to work either
Seems odd that it would do the harddware test then not boot. Did you do the memory test? Start pulling out what harddware components you can. Could be hung on some hardware device.
can you get into open firmware?
Sometimes if volumes don't appear in Startup Manager (what you get when you hold down the Option key at startup), you need to reset the Mac's PRAM, NVRAM, and Open Firmware. Shut down the Mac, then power it up, and before the screen lights up, quickly hold down the Command, Option, P, and R keys, until the Mac has chimed twice more after the powerup chime.
Then, before the screen lights up, hold down Command-Option-O-F until the Open Firmware screen appears. Then enter these lines, pressing Return after each one:
reset-nvram
set-defaults
reset-all
"The reset-all command should restart your Mac. If so, you have successfully reset the Open Firmware settings."
http://support.apple.com/kb/TS1812?viewlocale=en_US
Should the fail...
Try taking the battery out for 10 minutes. Put battery back in. Cross fingers. Power the machine back on.
How to eject a cd from the internal cd drive:
eject cd
List of devices:
devalias
List of variables:
printenv
More than you ever wanted to know about open firmware
http://www.firmworks.com/QuickRef.html
Robert
Did you change the PRAM backup battery? It's worth trying.
Swapped out the battery and still no luck, though sitting at the machine just now and it looks like it's going to boot into safe mode hopefully! Got the rotating gear and a blue screen just taking a long time to boot! 5 mins
Ok started up in safe mode, but froze when I tried to do a restart
Have you blown the dust out lately?
How long will it run in Safe Mode?
Ran in safe mode for around 40 mins. Now will either not boot up or it goes as far as the login in safe mode and the hangs and needs restarted and then it wont go into safe mode until its sat for about 30 mins. Temperature problems? Not much dust inside the case.
It sure sounds like temperature problems, likely the thermal past on the CPUs need replacing.
Been switched off for an hour and now wont boot in safe mode
Hmmmm, if you ever do get it started in Safe Mode, try System Preferences>Energy Saver>Options tab>Processor Performance>Reduced.
Then see if yo can get Temperature Monitor to see if it's heat related...
Power Mac G5 2.0Ghz Boot Problem
