G5 Powermac 1.6

Just took delivery of a used G5 1.6 PowerMac - looked good to go but I can’t get any picture to show on the monitor and the fans build up to a full-on crescendo within 5 minutes.

I suspect I’ve ben sold a dud, but as it had no operating system installed I don’t know whether this is usual or not - especially as I can’t see anything!!

Maybe when the operating system is installed things quieten down?

Nevertheless, no video is not a good sign. Just wondered in anyone with G5 tower experience can shed light on anything?..tips or tricks?

thanks, Hugh

ps. with no operating system installed, how do you open the DVD drive to insert install disks??!!
Actually I was going to start in target mode from a firewire drive and copy my cloned G4 Tiger installation across. But as I say, can’t see anything on screen.


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To get the disk tray open, hold down the mouse button while you start up the Mac. As far as the rest of it goes, the first thing I would try is to replace the PRAM battery. If it’s the same as other Macs, it will be roughly the size of a AA battery cut in half lengthwise. You can get them at Radio Shack or other electronics stores. For about $7 and no soldering required, it’s one of the simplest and cheapest troubleshooting steps.

Walter


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Hi Walter,

Just tested the batt on a meter and it’s chock-a-block full of power, 100% ok.

Hmmm…


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Reset PRAM, NVRAM, and power manager (if it has one – not sure about
that last one). Instructions are on the Apple Support site, and vary
by machine. If you can get ahold of a TechTool Pro disk or the Apple
Hardware Test disk for this machine, run it.

Walter

On Jun 28, 2009, at 8:10 AM, hugh wrote:

Hi Walter,

Just tested the batt on a meter and it’s chock-a-block full of
power, 100% ok.

Hmmm…


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Thanks Walter, not sure how to do those but I will find out - trouble is: I cannot see anything on-screen!


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If you bought this thing used, maybe the video card got jostled loose
in shipping. Open it up, remove and re-seat each card that plugs into
the main board, and see if that helps. Even if it’s screwed in to the
PCI rail, un-screw it, un-plug it entirely, and plug it back in. I can
imagine one end becoming un-plugged, after all those are long and
heavy cards with just a PC board edge in a set of spring clips to hold
the connections together. Kinda makes me hanker for the bad old days
of NuBus cards…

Walter

On Jun 28, 2009, at 10:39 AM, hugh wrote:

Thanks Walter, not sure how to do those but I will find out -
trouble is: I cannot see anything on-screen!


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I too was having all sorts of issues with my shipped Mac but after
unplugging and re-seating every board and cable that I could easily
get to - without completely gutting it, of course - it all worked fine
from then on. Shipping really does a number on this stuff and even it
things appear solid and well-seated that isn’t always the case.

Todd

On Jun 28, 2009, at 9:57 AM, Walter Lee Davis wrote:

If you bought this thing used, maybe the video card got jostled
loose in shipping. Open it up, remove and re-seat each card that
plugs into the main board, and see if that helps. Even if it’s
screwed in to the PCI rail, un-screw it, un-plug it entirely, and
plug it back in. I can imagine one end becoming un-plugged, after
all those are long and heavy cards with just a PC board edge in a
set of spring clips to hold the connections together.


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OK, will have a go at re-seating everything - it was delivered in my sisters car, she’s just driven 200 miles with it. (but I preferred that to unknown courier handling!)

Can you tell me…should the G5 start with a chime or something? This just powers up, the light in the on/off button blinks, and the fan starts very quietly…and gets noisier…and noisier…until all fans are running full bore. I hate to think of the power consumption!


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No, no luck I’m afraid - I reseated the video card, the ram, and checked any other connections which appeared moveable. But just the same scenario…

Powers up without a chime, very quietly, white light blinks…no video appears on screen…then after about three minutes you can hear other fans starting up until the thing si running full bore. It sounds just like a big jet starting up at an airport, and by the time it’s running flat out it’s shoving so much air out the back ports I’m surprised it hasn’t taken off itself! Pretty deafening and you certainly couldn’t work with it.

But no video, so can’t really analyse anything.

I’ve tried restarting it several times with command-option-P-R, but nothing changes.

The only possible video thing which might make a difference is that this seems to have a different type of video port, but I’ve got a (brand new Apple) VGA converter attached so it should be working.

Looks like a “return to sender” :wink:


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UPDATE… a step forward!

Changed out some RAM and things are looking up! It came with four sticks of 128, but I’d already pre-ordered 2x512 sticks knowing I’d be needing at least 1gb (and more eventually). I had installed the 2x512 before I even started.

Reinstalling the removed 2x128 has immediately changed things. I now get a chime on startup and then a grey screen with a folder in the middle (with ye olde Mac faces on it!)

OK, we have video, we have, power etc…but no operating system.

Now I haven’t got my set of Tiger disks anymore so I wanted to clone the hard drive by starting up from my recent Firewire bootable clone (G4 backup).

So I attached the Firewire drive and restarted the G5 holding down the T key. Unfortunately, I have not been rewarded with a startup…or even a firewire icon on screen.

Hmmm…what next?

Incidentally, although I’ve got video and some semblance of Mac response…the fans still went AWOL after 3 minutes…but maybe that’s because nothing is happening to control them?


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On 28 Jun 2009, at 19:29, hugh wrote:

Incidentally, although I’ve got video and some semblance of Mac
response…the fans still went AWOL after 3 minutes…but maybe
that’s because nothing is happening to control them?

Yes, I think that’s the case; the fans are controlled by the OS, and
if there isn’t one …

best wishes,

Paul Bradforth

http://www.paulbradforth.com


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On 28 Jun 2009, at 19:29, hugh wrote:

Changed out some RAM and things are looking up! It came with four
sticks of 128, but I’d already pre-ordered 2x512 sticks knowing I’d
be needing at least 1gb (and more eventually). I had installed the
2x512 before I even started.

Reinstalling the removed 2x128 has immediately changed things. I now
get a chime on startup and then a grey screen with a folder in the
middle (with ye olde Mac faces on it!)

Have you got the RAM in the right slots?

best wishes,

Paul Bradforth

http://www.paulbradforth.com


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Have you got the RAM in the right slots?

best wishes,

Paul Bradforth

http://www.paulbradforth.com

Hi Paul,

Well, I think so!! There are 4 RAM slots…I took two sticks out…and put two sticks in! I assume that’s right? Or is there some preference order/sequence? All the advice I’ve read says RAM must be installed in pairs for this model - and that’s what I put in, a pair of 512s.

regards
Hugh


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The hardware runs the fans full speed when the OS isn’t controlling them to protect itself. This will happen as well when you start the machine from certain but not all CD/DVDs, depending on how the OS is set up on those.

If you dig around Apple’s support site, you should be able to find a ton of set up and diagnostic info for the model that you bought, as well as possibly a PDF of the original manual.


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On 28 Jun 2009, at 19:43, hugh wrote:

Well, I think so!! There are 4 RAM slots…I took two sticks
out…and put two sticks in! I assume that’s right? Or is there some
preference order/sequence? All the advice I’ve read says RAM must be
installed in pairs for this model - and that’s what I put in, a pair
of 512s.

Sounds OK to me. You might look up on the Apple site (somewhere!) if
it matters which bank of slots they go in though.

best wishes,

Paul Bradforth

http://www.paulbradforth.com


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I had an idea to install Panther…whose disks I have got. At least it would get me started and I could ‘upgrade’ or clone from there.

I opened the CD/DVD drive door by holding down the mouse key on startup as per Walter’s suggestion. Drive door out, Panther disk 1 in, close drive. Wait…nothing.

Then did a restart holding down the C key. Again nothing.

Had to do a restart-with-mouse to get the disk out again.

Gee, this is hard work…


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Although i’m not sure this applies to a G5, are you sure it’s got a DVD drive? Some Macs did not ship with one originally so your system startup disk will have to be a CD if that is the case.


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The spec has it as a DVD-R/CD-RW, I’ve no reason to believe it is otherwise and it doesn’t look as thought it’s been tampered with in that area.


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If your Panther disks predate the G5, they will not start it up. If your Panther disks came with another Mac, they may not start up any Mac but the one they came with (I’m not 100% sure of that though).

Go to this page on Apple’s support site and find out more about your model. Get the model number and find out which one you have and see what Apple says about it in Tech Specs, and more.

http://www.apple.com/support/powermac/


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Thanks joe,

I put A1047 in the Apple site yesterday and it says absolutely nothing about the model whatsoever…just a few links to Final Cut and other stuff.

Give that the G5 has no operating system, I wouyld still have expected some reaction when sticking the disk in…even if it’s to say 'can’t run that disk". Instead the screen remains resolutely grey and unperturbed…!


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