I am attempting to startup a Mac G5 (Dual 1.8), but can only get a far as the gray screen with a flashing ?/Finder Icon. Machine will power up and fans will spin at max. Have tried to boot in various modes (safe mode, single user mode) with no success. Have tried to boot from G5 software install dvd (10.3) with no success. Any advice would be appreciated ;-)
Dual G5 1.8
Hi Stephen,
Disconnect the data cable from the Hard Drive, then the Optical drive, see if Single User mode will boot.
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...
ive got the same issue on a duel 2.3Ghz late 2005 G5, ive tried the above but nothing?
Disconnected the data cable from the Hard Drive, then the Optical drive. Attempted to restart in Single User mode. No luck. Reset SMU/PMU and restarted. No luck.
If you're sure the RAM is good, try the Hair Dryer trick...
http://discussions.apple.com/message.jspa?messageID=13240047#13240047
https://discussions.apple.com/thread/3061091?answerId=15223603022#15223603022#15223603
https://discussions.apple.com/thread/2620983?answerId=15499912022#15499912022#15499912
https://discussions.apple.com/thread/3175959?answerId=15613068022#15613068022#15613068
https://discussions.apple.com/thread/3270112
https://discussions.apple.com/thread/3287993?answerId=16053892022#16053892022#16053892
No power light at all...
https://discussions.apple.com/thread/3692775?tstart=0
It can show on any G5, and even many other computers & electronic devices of the period.
http://www.macintouch.com/reliability/pmg5.html
http://lowendmac.com/ppc/power-macintosh-g5.html
And see this last one in particular...
https://discussions.apple.com/thread/3507385?answerId=16781690022#16781690022
G5 will not boot from HD or DVD
