Hello mates.
Bad year for my MorphOS machines.
I was using MorphOS playing with fantastic ACE emulator and suddenly system freeze.
Well, tried to reboot with power Burton and stuck in gray screen.
Turn off and wait a fee seconds and the same.

Try to boot macos and stuck in Apple logo.

Try to boot MorphOS from USB and stuck in gray screen.

The same from MorphOS CD.

I can access open firmware but any attempt to boot a system fails.

I reseat ram, change gfx card, reset pram (and everything can be reset) with no success.
Dont know what else to do.
Any idea?


Thanks!

Sounds similar to the final failed reboot with my iMac when the SSD was kinda failing.

Swapped SSD with the one from a MiniITX PC I use for Linux and BOTH systems work without problems.


Something something TRIM I'd guess, which you might get fixed by either putting the SSD into a PC or installing Linux (since OSX10.5 won't help) to defraggle the drive.


On the PowerMac_G5 I still use an ancient Seagate hybrid drive which just as good as a full SSD for something as small as MorphOS while doing all the magic on it's own.

If you can enter Open Firmware Console, hardware-check is done and G5 is OK.
Just remove all drives (SATA) and any external equipement (USB-devices) and try to boot from MorphOSCD.
If this works, one of your removed devices influences boot-behaviour.
Then try to find out, which device is fault.

Power Led blinked ?

Sorry for answer so late...busy times.
Thanks for the help but no success ata the time.

There no blink in the power button.
I have disconnected every thing but CD/DVD player but when MorphOS or macos CD starts It freeze.

I can start Apple software diagnostic CD (in OF mode not in OS mode, whatever it means) and passed all tests.

In verbose mode It stuck when show "DART enabled"

So my last option is to try Kronos suggestion cos I run out of ideas.


[ Editado por tolkien 05.01.2024 - 16:14 ]

Fastest test would be to replace the SSD with any random old SATA drive and try to install MorphOS (or OSX) onto it.

If all devices are disconnected and G5 won't run from DVD-Drive, what influence should a change of SSD have?

Diag-CD has 2 modes: OF and OSX-mode.
If system passes OF mode, then there are no hardware issue detected. This normaly means your hardware is OK!! But this is also known bei booting into a working OF-console - which works too (in your case).

2nd test is OSX-mode: This will be interessting, if this works or not. In this case drivers for all devices are overtaken by OSX (OF-drivers are not longer active) and some functionalities are enabled, witch OF does'nt. If this is working, then your issue is very strange.....

One thing witch OF does'nt test during boot, are different resolutions of your graphics-card - but OSX and MorphOS does! Maybe there is an issue......

I did google that "DART enabled" line and found this:
https://www.macuser.de/threads/g5-bootet-nur-bis-zum-apple-logo.569586/

Similar symptoms that were "fixed" by not using a problematic RAM slot.


Only to be broken again a week later.....

Maybe.....OF does'nt use much RAM and does only a rudimentary RAM-test at start-up.
A break after the Apple-logo, points in most cases to a not established kernel (this is done be bootx (bootloader) in /coreservices). OSX core or Quark-core (MorphOS) needs much more RAM!
In some (very) rare cases the CPU No.1 itself causes such or a similar behaviour. Can be tested by changeing CPU position on motherbord (needs also new thermal calibration then).

Damage of motherbords are very rare - most of issues are caused by mounted devices as RAM, CPU-towers, PCI/AGP-cards, or masstore-devices and last, but not least, power supply or faulty PRAM-battery.






[ Editiert durch Amigaharry2 05.01.2024 - 22:52 ]

Hello! Almost finish Santa Claus day and Hope to have some time to try to fix the problem.
What I have done is try with another gfx card but with no luck.
Dont know if this is a RAM problem.

I have another motherboard from a 2.5 GHz powermac (mine is 2 GHz) and dont know if I could use that with current cpus.

Yes, is possible! But needs thermal calibration.

Hello mates!
Some good and some bad news.
I had a few days free and after trying a lot of things I know what the problem is.
Seems one of the CPU was died ( or semi died)
I exchanged them by luck and voilà...It works again!

Now Im a bit afraid why it died and I looking to the temperatures.
Morphos shows 72 grades Centigrades in one cpu and 53 in the other.
What are normal temperatures in a 2.0 ghz G5?

Another problem was that after reseting all type of things seems that I need to recalibrate temperature sensors.
Fans are loud until Morphos starts.

I have tried to use Apple CD to calibrate it but it cant...It sais I have to change cpus. (dont know if where the correct cd version).

And another problem. I cant enter OpenFirmaware. Seems it cant recognise muy keyboard at startup (it is the same I used always).

But hey! I think It is a good sign it runs MorphOS.

Hope you can bring me some ideas.

Temperatures are normal!
If your Firmware is "old" enough you can remove 2nd cpu - PowerMac will work anyway with one CPU (in slot 1). You have to test. Then calibration should be possible (at moment it seems to have a problem with your 2nd, defective CPU).

ASD 2.5.8 seems to be suitable for your G5. If it is a late 2005 you may need 2.6.3. In this case it won't work with one CPU...

After calibration:

Use CPU-Temperature shell-command (MorphOS) to control temperature:

PowerMac7FanControl CPUTemperatureTarget 65 BackSideTemperatureTarget 55

This values are proper for my G5_2.3GHz. You won't hear the fans......
Backsidetemp is the NorthBridge, which blower you hear in most cases, when G5 gona be a starting jet (not CPU fans)!

[ Editiert durch Amigaharry2 29.02.2024 - 20:37 ]

Thanks! I have a few things to try then.
Hope to have time next week.
I will Inform.

Hello again fellows.
No time to do some research but I have found a G5 cpu at 2.0 ghz and I have doubts.
Can any g5 be used (at the same speed)? Do I need to change both cpus with matched ones or can change only the dead one?

All of G5 I've seen, recognize automatically CPU-speed and configure themselves propper (Bus-Speed, etc.).
There may be a problem with older G5-mainbords, running only 1.6 or 1.8 GHz from stock, fitting with a 2.5 or 2.7GHz CPU-tower. But I never had done such a big leap, so I don't know, if they can do it or not.
Useing 2.3 GHz CPU on 1.8Ghz-motherbord works (Im writing at moment on such a G5). This also depends on installed Firmware. To know it for sure, means to test it......

If you install two new CPU's, both MUST be from same type and speed. You may try to do what I wrote above: Test it with only one CPU in place - you don't need more for MorphOS and OSX also runs with only one CPU.
(I also figured out that Northbridge becomes a lot cooler with only one CPU -> PowerMAC is running very, very silent!).

>> Do I need to change both cpus with matched ones
>> or can change only the dead one?

> If you install two new CPU's, both MUST be from same type and speed.

I guess this is also true when replacing only one of the two CPUs ;-)

After changing one of the CPUs, change thermal paste, change CPU position, try with another main board now it seems it finally works!!! I dont know what was the reason hehehehe

The problem with the openfirmware seems to be the keyboard. When I use an old one I can enter OF without problems but I have tried serveral ones and none works well when enter to OF. Extrange...

Well...Im happy to have my MorphOS machine working again.

Thanks for the support mates

Yeah! Newer keybords sometimes won't work (especially wirelss). For that cases (to enter OF) I kept an old, wired one too.

.... , try with another main board .... -> perhaps that's the reason?

All of them are wired!
And I used again the same main board I had when It failed.
Its all so extrange...Will try this week if It is all really ok and know what is the reason of the keyboards.

Perhaps some setting in the OF that I reset?
Who knows?! :)

There is nothing to reset for KB in OF. This issue with some wireless KB isn't new. I don't know what's the reason for, but it may be a timing-problem or a not correct implementation of USB-connection in KB. Because sometime it works and sometime not......never found out why. Wired KB (normaly) always works (but not on EFIKA - here I have a wired one, which won't work, while the wireless one from Mac does it's job -crazy!)


[ Editiert durch Amigaharry2 20.03.2024 - 11:31 ]