Re: G4 DP 450 Gig-E issues

2010-12-05 Thread Amanda Ward
On Dec 4, 2010, at 10:51 PM, Dan wrote:

 At 10:01 PM -0500 12/4/2010, rtows...@aol.com wrote:
 1. Pulled video card, ram  HD, replaced pram battery. Still no 
 beeps/chimes/fans or HD spin.
 2. Power Supply shows no 28v so guess it's the supply.
 
 Sounds like it.
 
 Going looking for one now :-(
 
 The GigE and DA use the same basic supply.
 
 When you get done gasping at the power supply prices, check this out:
 http://atxg4.com/

Nice. I ended up buying a parts machine (with P/S) for less than a power supply 
alone would have cost me. 

Amanda


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G4 DP 450 Gig-E issues

2010-12-04 Thread rtows...@aol.com
Appears to be dead...

No power-up light
Non fans
No chimes
No HD spin

Seem to recall possibilities are power supply or front panel board.
Any way to isolate?
I have unplugged monitor, kybd  ext FW drive followed by int HD
with no change. There are no pci cards installed.

Recommendations?

Thx BobT

DP 450
768 Meg
Int 40 GB  20 GB pata
Ext 300 GB FW
OSX 10.4.11  9.22

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Re: G4 DP 450 Gig-E issues

2010-12-04 Thread Peter Haas


On Dec 4, 2010, at 11:40 AM, rtows...@aol.com wrote:


No power-up light
Non fans
No chimes
No HD spin


The FIRST thing to check is the input power switch.

It has a 115 position and a 230 position.

If placed on the 230 position, but operated on 115 volts, the PSU's  
converter section is operated as a full-wave bridge, and the  
intermediate dc bus voltage will be only 162.25 volts, whereas it  
needs to be 325 volts for proper operation.


If placed on the 115 position, and operated on 115 volts, the PSU's  
converter section is operated as a half-wave voltage doubler, and  
the intermediate dc voltage will be 325 volts, as is expected and  
required for proper operation.



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Re: G4 DP 450 Gig-E issues

2010-12-04 Thread Alex Barnes
Is the video card a flashed PC version? If it is make sure that pins 311 are 
disabled by cutting or taping them.
On Dec 4, 2010, at 12:40 PM, rtows...@aol.com wrote:

 Appears to be dead...
 
 No power-up light
 Non fans
 No chimes
 No HD spin
 
 Seem to recall possibilities are power supply or front panel board.
 Any way to isolate?
 I have unplugged monitor, kybd  ext FW drive followed by int HD
 with no change. There are no pci cards installed.
 
 Recommendations?
 
 Thx BobT
 
 DP 450
 768 Meg
 Int 40 GB  20 GB pata
 Ext 300 GB FW
 OSX 10.4.11  9.22
 
 -- 
 You received this message because you are a member of G-Group, a group for 
 those using G3, G4, and G5 desktop Macs - with a particular focus on Power 
 Macs.
 The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette 
 guide is at http://www.lowendmac.com/lists/netiquette.shtml
 To post to this group, send email to g3-5-list@googlegroups.com
 For more options, visit this group at http://groups.google.com/group/g3-5-list


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Re: G4 DP 450 Gig-E issues

2010-12-04 Thread Dan

At 11:40 AM -0800 12/4/2010, rtows...@aol.com wrote:
[Config moved from bottom of OP and cleaned]
  450-MHz Power Mac G4 DP GigE, 768 MB RAM, 40 and 20 GB HDs
  External ?wired? kvm, and 300 GB firewire HD.
  Mac OS 9.2.2 and X 10.4.11.

[Aside - When having a hardware problem, why do people put their 
hardware information at the bottom of the message?  That's about as 
bad as top-posting, IMO.  It means we have to skip to the end to 
learn the config then go back to the top and re-read...  That's just 
not a good use of anyone's time.]


Appears to be dead... No power-up light Non fans No chimes No HD 
spin Seem to recall possibilities are power supply or front panel 
board. Any way to isolate? I have unplugged monitor, kybd  ext FW 
drive followed by int HD with no change. There are no pci cards 
installed.


(In this order, but stop when something works, of course).

Zap the PRAM.

Replace the PRAM Battery.

Disconnect all internal drives, pull all the memory and the video 
card.  See if that produces at least some error beeps.  If it does, 
then your ps is fine, you just need to fix whatever the beep said.


Disconnect the power supply and check its voltages... (looks like 
other replies have covered that)


Do you need the repair manual?

- Dan.
--
- Psychoceramic Emeritus; South Jersey, USA, Earth.

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Re: G4 DP 450 Gig-E issues

2010-12-04 Thread rtowsley



-Original Message-
From: Peter Haas peterh...@cruzio.com
To: g3-5-list@googlegroups.com
Sent: Sat, Dec 4, 2010 2:49 pm
Subject: Re: G4 DP 450 Gig-E issues


On Dec 4, 2010, at 11:40 AM, rtows...@aol.com wrote: 
 
 No power-up light 
 Non fans 
 No chimes 
 No HD spin 
 
The FIRST thing to check is the input power switch. 
 
It has a 115 position and a 230 position. 
 
If placed on the 230 position, but operated on 115 volts, the PSU's converter 
section is operated as a full-wave bridge, and the intermediate dc bus voltage 
will be only 162.25 volts, whereas it needs to be 325 volts for proper 
operation. 
 
If placed on the 115 position, and operated on 115 volts, the PSU's converter 
section is operated as a half-wave voltage doubler, and the intermediate dc 
voltage will be 325 volts, as is expected and required for proper operation. 
 


Hi Peter,
Should have mentioned I had verified that already. Pram battery shows 3.69V 
although it's about 3-4 yrs old. System was working earlier yesterday but 
wouldn't come on a few hours later.
Thx,
BobT



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Re: G4 DP 450 Gig-E issues

2010-12-04 Thread rtowsley







-Original Message-
From: Alex Barnes kab...@gmail.com
To: g3-5-list@googlegroups.com
Sent: Sat, Dec 4, 2010 2:49 pm
Subject: Re: G4 DP 450 Gig-E issues


Is the video card a flashed PC version? If it is make sure that pins 311 are 
disabled by cutting or taping them.
On Dec 4, 2010, at 12:40 PM, rtows...@aol.com wrote:

 Appears to be dead...
 
 No power-up light
 Non fans
 No chimes
 No HD spin
 
 Seem to recall possibilities are power supply or front panel board.
 Any way to isolate?
 I have unplugged monitor, kybd  ext FW drive followed by int HD
 with no change. There are no pci cards installed.
 
 Recommendations?
 
 Thx BobT
 
 DP 450
 768 Meg
 Int 40 GB  20 GB pata
 Ext 300 GB FW
 OSX 10.4.11  9.22
 
 -- 
Video card is stock 128 Rage Pro

 You received this message because you are a member of G-Group, a group for 
those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs.
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guide is at http://www.lowendmac.com/lists/netiquette.shtml
 To post to this group, send email to g3-5-list@googlegroups.com
 For more options, visit this group at http://groups.google.com/group/g3-5-list


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those 
using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs.
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Re: G4 DP 450 Gig-E issues

2010-12-04 Thread rtowsley






-Original Message-
From: Dan dantear...@gmail.com
To: g3-5-list@googlegroups.com
Sent: Sat, Dec 4, 2010 3:12 pm
Subject: Re: G4 DP 450 Gig-E issues


At 11:40 AM -0800 12/4/2010, rtows...@aol.com wrote: 
[Config moved from bottom of OP and cleaned] 
  450-MHz Power Mac G4 DP GigE, 768 MB RAM, 40 and 20 GB HDs 
  External  300 GB firewire/usb enclosure (unplugged). 
  Mac OS 9.2.2 and X 10.4.11. 
 
[Aside - When having a hardware problem, why do people put their hardware 
information at the bottom of the message?  That's about as bad as top-posting, 
IMO.  It means we have to skip to the end to learn the config then go back to 
the top and re-read...  That's just not a good use of anyone's time.] 
 
Appears to be dead... No power-up light Non fans No chimes No HD spin 
Seem to recall possibilities are power supply or front panel board. Any way 
to isolate? I have unplugged monitor, kybd  ext FW drive followed by int HD 
with no change. There are no pci cards installed. 
 
(In this order, but stop when something works, of course). 
 
Zap the PRAM. 
 
Replace the PRAM Battery. 
 
Disconnect all internal drives, pull all the memory and the video card.  See if 
that produces at least some error beeps.  If it does, then your ps is fine, you 
just need to fix whatever the beep said. 
 
Disconnect the power supply and check its voltages... (looks like other replies 
have covered that) 
 
Do you need the repair manual? 
 
- Dan. 
-- - Psychoceramic Emeritus; South Jersey, USA, Earth. 






Sorry for info at bottom. There is no KVM or other ext devices connected. I 
listed a 300 GB firewire/usb enclosure but it is disconnected. I corrected 
description above.


Yes, I could use the repair manual...thx




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Re: G4 DP 450 Gig-E issues

2010-12-04 Thread Dan

At 3:33 PM -0500 12/4/2010, rtows...@aol.com wrote:
[html removed]
There is no KVM or other ext devices connected. I listed a 300 GB 
firewire/usb enclosure but it is disconnected. I corrected 
description above.


yea, saw.

Replace that pram battery.  I don't care what it's unloaded voltage 
be - it's old.  It's the first thing to replace.


- Dan.
--
- Psychoceramic Emeritus; South Jersey, USA, Earth.

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Re: G4 DP 450 Gig-E issues

2010-12-04 Thread rtowsley








-Original Message-
From: Dan dantear...@gmail.com
To: g3-5-list@googlegroups.com
Sent: Sat, Dec 4, 2010 3:57 pm
Subject: Re: G4 DP 450 Gig-E issues


At 3:33 PM -0500 12/4/2010, rtows...@aol.com wrote: 
[html removed] 
There is no KVM or other ext devices connected. I listed a 300 GB 
firewire/usb enclosure but it is disconnected. I corrected description 
above. 
 
yea, saw. 
 
Replace that pram battery.  I don't care what it's unloaded voltage be - it's 
old.  It's the first thing to replace. 
 


1. Pulled video card, ram  HD, replaced pram battery. Still no 
beeps/chimes/fans or HD spin.
2. Power Supply shows no 28v so guess it's the supply.
Going looking for one now :-(
 
-- You received this message because you are a member of G-Group, a group for 
those using G3, G4, and G5 desktop Macs - with a particular focus on Power 
Macs. 
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Re: G4 DP 450 Gig-E issues

2010-12-04 Thread Jonas Ulrich
I to have a dual 450MHz powermac with the same symptoms. This is vey
helpful info.

Thanks everyone!
-Jonas

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Re: G4 DP 450 Gig-E issues

2010-12-04 Thread Dan

At 10:01 PM -0500 12/4/2010, rtows...@aol.com wrote:
1. Pulled video card, ram  HD, replaced pram battery. Still no 
beeps/chimes/fans or HD spin.

2. Power Supply shows no 28v so guess it's the supply.


Sounds like it.


Going looking for one now :-(


The GigE and DA use the same basic supply.

When you get done gasping at the power supply prices, check this out:
http://atxg4.com/

HTH,
- Dan.
--
- Psychoceramic Emeritus; South Jersey, USA, Earth.

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