Post by: ChuckD on July 15, 2003, 03:59:00 PM
Problem: G4 will not boot up.
Symptom: 1. Power light comes on when touched but then goes out when let go.
2. Red led on Logic board comes on.
3. Fans and power bus to board are all operational.
4. Heat sink on CPU does start getting warm, as per normal operation.
5. No Video, No attempt to spin the startup disk, no beeps or any other sounds.
I took it to my local guy who said he thought it was the logic board. Another opinion from somewhere else said it wasn't.
I tried the PMU reset and logic board resets but still no change.
First occured after leaving the machine on over night. Screen was frozen and did not respond to any keys. I had to un-plug and replug in. Then the problem occured.
Any Ideas???
Thanks,
Charles
Post by: Paddy on July 15, 2003, 04:32:08 PM
I fear that guy may be right...but for a few more ideas:
MacFixit thread
And for someone who appears to have the exact same problem as you (see Gigabarth's post - last one on the page):
Another MacFixit thread
Let us know if any of this helps!
Post by: pendragon on July 15, 2003, 04:46:47 PM
That said, a couple of thoughts until someone who really knows whereof they speaks stops by…
Have you had tried your install CD any third party utilities such as disk Warrior or Drive 10 (desperately hoping your CD drive still works)?
Also, have you recently installed Apple Hard Drive Update 1.0? It is notorious for killing drives. Even though the install was apparently successful, delayed problems have been noted.
Sorry for the weak response.
Harv
Post by: ChuckD on July 15, 2003, 05:08:21 PM
There are a few slight differences between their problems and mine.
1. Link Post #2 from above said that there is no Fan noise or power. In mine I do get power to all the proper connections, except the "green wire" which seems to indicate the status of the front power button somehow. My Fans all come on.
2. Link Post #1 said that when he took out his ram he got the Ram Error chime. Mine doesn't make any noise even if ram is out.
The CD or any other drives do not respond. It doesn't even try to boot the startup drive.
Please give me any suggestions Big or small, you never know!! New boards are expensive and that might not be the problem.
-Charles
Post by: krissel on July 16, 2003, 12:54:22 AM
Check out THIS ARTICLE.
It does sound like your problem:
QUOTE
TITLE
Power Mac G4: Screen is Black, No Startup Tone, Drive Does Not Operate
Article ID:
Created:
Modified: 95054
7/18/00
12/27/00
------------------------------------------------------------------------
TOPIC
The Power Mac G4 computer screen is black. The boot tone is not present, the drive does not operate, but the fan is running, and LED is lit.
Power Mac G4: Screen is Black, No Startup Tone, Drive Does Not Operate
Article ID:
Created:
Modified: 95054
7/18/00
12/27/00
------------------------------------------------------------------------
TOPIC
The Power Mac G4 computer screen is black. The boot tone is not present, the drive does not operate, but the fan is running, and LED is lit.
Good luck and let us know what happens.
Post by: ChuckD on July 16, 2003, 01:21:05 PM
Last night I pulled the video card and tried to boot. I think it worked!! I can't be certain as I have no video card but the machine gave it's tone and the drive started to spin and the button stayed lit.
When I put the card back in the problem comes back.
So I'm gonna borrow a video card and try again.
Charles
Post by: Gary S on July 16, 2003, 02:43:12 PM
Let us know.