PowerPC G4 startup issues

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Level 1

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PowerPC G4 startup issues

Hello all,

I have a Dual 1 GHz PowerPC G4 running OS 10.4.11. Once it's running it works great, it's getting it to startup that's sometimes a problem. If I shut it down then try and restart I have to let it sit for about an hour or so to restart. I've replaced the battery several times. When it dose start the power lights come on then they go off for a few secs then back on, also the monitor stays black and then the computer boots up and everything is fine. I also replaced the large fan about a year ago. I also don't hear the startup chime but my internal speaker is shot, I do have a usb sound system hooked up but dose that get loaded after the hardware check?

Posted on Oct 3, 2011 12:23 PM

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Answer 1

BDAqua

Level 10

238,997 points

Oct 3, 2011 12:42 PM in response to R_Mag

If you unplug everything from it including AC power, monitor, PRAM Battery, Printer, etc. & let it set a few minutes, does it start right up after attaching things again?

Have you done a PRAM reset, CMD+Option+p+r...

http://docs.info.apple.com/article.html?artnum=2238

Does it boot into Open Firmware with CMD+Option+o+f ?

http://docs.info.apple.com/article.html?artnum=42642

reset-nvram (press Enter)

set-defaults (press Enter)

reset-all (press Enter)

How to reset the SMU/PMU on a Power Mac Earlier G3, G4, G5 models...

http://support.apple.com/kb/HT1939

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Answer 2

R_Mag Author

Level 1

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Oct 3, 2011 1:15 PM in response to BDAqua

Hi, BD

Yes, I've done the pram/cuda reset. I haven't tried to boot into Open Firmware, sometimes soon as I release the power button it shuts off, sometimes it gets to loading the usb items then shuts off. When I replaced the battery the first time I reset the cuda waited 30 minutes put the battery in, hooked everything up and still had to wait about 1/2 hr then it booted up. I took out my usb hub and now have everything hooked directly into the mac ports and it's been starting (after waiting) on the first try but it still powers up like mentioned above.

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Answer 3

BDAqua

Level 10

238,997 points

Oct 3, 2011 1:53 PM in response to R_Mag

Hmmm, what all USB devices are there attached?

When it's up & running check System Profiler for USB power requirements, like...

USB Bus:

Host Controller Location: Built In USB

Host Controller Driver: AppleUSBOHCI

PCI Device ID: 0x0035

PCI Revision ID: 0x0043

PCI Vendor ID: 0x1033

Bus Number: 0x0b

HP LaserJet 1200:

Product ID: 0x0317

Vendor ID: 0x03f0 (Hewlett Packard)

Version: 1.00

Serial Number: 00XXXXXXXXXX

Speed: Up to 12 Mb/sec

Manufacturer: HewLett Packard

Location ID: 0x0b200000

Current Available (mA): 500

Current Required (mA): 2

General Purpose USB Hub:

Product ID: 0x2077

Vendor ID: 0x0451 (Texas Instruments)

Version: 1.00

Speed: Up to 12 Mb/sec

Location ID: 0x0b100000

Current Available (mA): 500

Current Required (mA): 0

DPCM-USB:

Product ID: 0x0006

Vendor ID: 0x07af

Version: 1.00

Speed: Up to 12 Mb/sec

Manufacturer: Microtech International, Inc

Location ID: 0x0b170000

Current Available (mA): 500

Current Required (mA): 100

HL-4070CDW:

Product ID: 0x0030

Vendor ID: 0x04f9 (Brother Industries, Ltd.)

Version: 1.00

Serial Number: 000F8J260707

Speed: Up to 12 Mb/sec

Manufacturer: Brother

Location ID: 0x0b110000

Current Available (mA): 500

Current Required (mA): 2

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Answer 4

R_Mag Author

Level 1

0 points

Oct 3, 2011 2:09 PM in response to BDAqua

I took off my printer and I have a firewire drive that sometimes mounts and sometimes it dose not. Could it possibly be the video card since the screen is black till the system software loads?

USB Bus:

Host Controller Location: Built In USB

Host Controller Driver: AppleUSBOHCI

PCI Device ID: 0x0019

PCI Revision ID: 0x0001

PCI Vendor ID: 0x106b

Bus Number: 0x18

Hub:

Version: 1.10

Bus Power (mA): 500

Speed: Up to 12 Mb/sec

Product ID: 0x9117

Vendor ID: 0x05ac (Apple Computer, Inc.)

Keyboard Hub:

Version: 96.15

Bus Power (mA): 500

Speed: Up to 12 Mb/sec

Manufacturer: Apple, Inc.

Product ID: 0x1006

Serial Number: 000000000000

Vendor ID: 0x05ac (Apple Computer, Inc.)

Kensington USB/PS2 Wheel Mouse:

Version: 1.00

Bus Power (mA): 100

Speed: Up to 1.5 Mb/sec

Manufacturer: Kensington

Product ID: 0x1030

Vendor ID: 0x047d

Apple Keyboard:

Version: 0.67

Bus Power (mA): 220

Speed: Up to 1.5 Mb/sec

Manufacturer: Apple, Inc

Product ID: 0x0220

Vendor ID: 0x05ac (Apple Computer, Inc.)

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Answer 5

BDAqua

Level 10

238,997 points

Oct 3, 2011 2:37 PM in response to R_Mag

Could be the Video card, but the symptoms so far are most likely a bad Capacitor in the PSU, (or elsewhere), that needs to bleed off the charge before it'll start. Quite common on MDD G4s especially.

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