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Level 1

8 points

G5 dual 2.7GHz refuses to get past the grey apple logo screen no matter what I do!

Hoping that someone might be able to help, as I think I have tried pretty much everything and I’m running out of ideas now!

It’s a G5 dual 2.7GHz that refuses to get past the grey apple logo screen no matter what I do!

everything passes the extended apple hardware test (2.5)
3GB of RAM (2x1GB brand new from crucial)
won’t start from a original OS 10.58 disk
passes disk utility when connected to another mac via FW target mode
nothing other than keyboard/monitor attached
all of this done; http://support.apple.com/kb/TS2570
tried alternative HDD’s without any joy
won’t safe boot
stays at the grey apple logo screen and the fans then start revving up excessively

Any other suggestions or advice very gratefully received! 😕

PowerMac, Mac OS X (10.5.8), G5 dual 2.7GHz

Posted on May 8, 2011 2:20 PM

21 replies

dubtastic Author

Level 1

8 points

May 9, 2011 3:56 PM in response to dubtastic

OK BDAqua, tried that, but no joy. First time it came up with the grey screen of death, next two times got to the grey apple logo screen and froze, with no progress ‘gear’ in sight. Will leave it unplugged over night again…

BDAqua

Level 10

239,375 points

May 9, 2011 4:33 PM in response to dubtastic

Long shot, but might pull the data cable from the Optical drive & try it again.

dubtastic Author

Level 1

8 points

May 10, 2011 2:25 AM in response to dubtastic

OK, double checked all the wired connections,plugged it back in and it has started.There was a crash report to send to Apple;

----

Interval Since Last Panic Report: 385 sec

Panics Since Last Report: 1

Anonymous UUID: 530D870F-9387-41BE-B8EC-58143705FB87

Thu Jan 1 01:00:31 1970

Unresolved kernel trap(cpu 1): 0x300 - Data access DAR=0x0000000000408E70 PC=0x00000000000B40B4

Latest crash info for cpu 1:

Exception state (sv=0x54bad280)

PC=0x000B40B4; MSR=0x00009030; DAR=0x00408E70; DSISR=0x0A000000; LR=0x0007D238; R1=0x4C8775D0; XCP=0x0000000C (0x300 - Data access)

Backtrace:

0x0007D220 0x0007E974 0x0007F808 0x0036A974 0x0036ACC8 0x0036A330

0x0035D850 0x0035DBE4 0x00334870 0x552F3494 0x552F32F8 0x552F84D8 0x55859624 0x003454C4

0x00346618 0x003484C8 0x003475E8 0x000B0E54

Kernel loadable modules in backtrace (with dependencies):

com.apple.driver.AppleK2SATA(1.0.4f2)@0x55857000->0x5585bfff

dependency: com.apple.iokit.IOPCIFamily(2.5)@0x4c7c5000

dependency: com.apple.iokit.IOATAFamily(2.0.0)@0x552ed000

com.apple.iokit.IOATAFamily(2.0.0)@0x552ed000->0x552fefff

Proceeding back via exception chain:

Exception state (sv=0x54bad280)

previously dumped as "Latest" state. skipping...

Exception state (sv=0x46699000)

PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

BSD process name corresponding to current thread: kernel_task

Mac OS version:

Not yet set

Kernel version:

Darwin Kernel Version 9.6.0: Mon Nov 24 17:39:01 PST 2008; root:xnu-1228.9.59~1/RELEASE_PPC

System model name: PowerMac7,3

panic(cpu 1 caller 0xFFFF0003): 0x300 - Data access

Latest stack backtrace for cpu 1:

Backtrace:

0x0009BCF0 0x0009C694 0x00029EA0 0x000AFA90 0x000B32F8

Proceeding back via exception chain:

Exception state (sv=0x54bad280)

PC=0x000B40B4; MSR=0x00009030; DAR=0x00408E70; DSISR=0x0A000000; LR=0x0007D238; R1=0x4C8775D0; XCP=0x0000000C (0x300 - Data access)

Backtrace:

0x0007D220 0x0007E974 0x0007F808 0x0036A974 0x0036ACC8 0x0036A330

0x0035D850 0x0035DBE4 0x00334870 0x552F3494 0x552F32F8 0x552F84D8 0x55859624 0x003454C4

0x00346618 0x003484C8 0x003475E8 0x000B0E54

Kernel loadable modules in backtrace (with dependencies):

com.apple.driver.AppleK2SATA(1.0.4f2)@0x55857000->0x5585bfff

dependency: com.apple.iokit.IOPCIFamily(2.5)@0x4c7c5000

dependency: com.apple.iokit.IOATAFamily(2.0.0)@0x552ed000

com.apple.iokit.IOATAFamily(2.0.0)@0x552e`

dubtastic Author

Level 1

8 points

May 11, 2011 6:01 AM in response to dubtastic

Checked the CD/DVD cables and all OK. When I unplugged it over night and stated it in the morning, I managed to download iStat and check temps and all seemed OK, just that after a little while it freezes up. I even manage to get it started from the DVD if I leave it unplugged over night with the DVD in and then start from the DVD in the morning?

Any more suggestions?

May 11, 2011 3:29 PM in response to dubtastic

Those G5 Powermacs especially the liquid cooled ones all seem to have the same malady over and over again. If it is not the leakage problem, then it is either the lead free solder issue at the ram slots or most likely the power supply, Yes, the power supply. I fixed two of them. The first one, was stalling at the grey apple logo and would not boot up from anything, the install CD, the internal HD and ext, HD as well as DiskWarrior. It would just hang at the grey apple and the fans would go wild. I took a hair dryer and heated the area around the ram slots and slightly to the right of them where you see a square with lots of solder activity. That area chip ( back of the MoBo ) is soldered by a system of ball array that can unsolder certain contacts by heat/cool/heat cycling over time. I kind of reflowed the solder and the Mac is as new. The other Mac had the exact startup malady and it was a power supply replacement. The Mac would start up to the grey screen, but for some reason it needed extra power to get things rolling with the gear spinning thing, It is as if the PS at that point after the grey screen needed to pump out more juice to fire it up. At times it would start up but only for a few seconds or minutes until the grey screen of death shows up and asks for a force shutdown. Both Macs are running fine but check for ang signs or leakage under the processors and on top of the PS. That sort of leakage was really a defect in those models and in some cases were replaced free by Apple.

dubtastic Author

Level 1

8 points

May 20, 2011 3:37 AM in response to dubtastic

Not sure if reflowing solder is the point at which I should give up and cut my losses on it!

G5 dual 2.7GHz refuses to get past the grey apple logo screen no matter what I do!