G4 just replaced power supply , it powers up , but the screen is not on and the mouse and keyboard aren't on either. A few times the computer came on with screen working but then it froze up, can't do any type of reset cause of keyboard not working. Help!

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G4 just replaced power supply , it powers up , but the screen is not on and the mouse and keyboard aren't on either. A few times the computer came on with screen working but then it froze up, can't do any type of reset cause of keyboard not working. Help!

G4 just replaced power supply , it powers up , but the screen is not on and the mouse and keyboard aren't on either. A few times the computer came on with screen working but then it froze up, can't do any type of reset cause of keyboard not working. Help! Pressed pmu button already, nothing ,.. Ppc g4 Mac

PowerMac

Posted on May 17, 2012 6:17 AM

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Answer 1

BDAqua

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May 18, 2012 2:16 PM in response to Damien6

Have you reseated the Video card?

Might be time to replace the PRAM Battery, 4 years is close to their lifespan, far less if ever without AC power, & can cause strange startup problems...

http://eshop.macsales.com/item/Newer%20Technology/BAA36VPRAM/

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Answer 2

Damien6 Author

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May 18, 2012 11:54 PM in response to BDAqua

Ok aqua, I'll replace the battery , but the computer is now working a lot better, been on for a few hour now no freezing. Was doing update and it blanked out a few times, but I touch the mouse i hear the fan spin and I comes back and never stopped downloading the whole time, but after update is when it normalized a bit. The only problem is when I attach my iPhone the computer completely freezes and must be turned off, anyone have any suggestions? Is this some kind of short? If so where?

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Answer 3

BDAqua

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May 19, 2012 1:05 AM in response to Damien6

How & what port are you connecting the iPhone to?

Does it ever have problems without the iPhone?

Open Console in Utilities & see if there are any clues or repeating messages when this happens.

Also, open console in Applications>Utilities, check the system log for the date/time of the last problem for clues.

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Answer 4

Damien6 Author

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May 19, 2012 1:38 AM in response to BDAqua

Ok will do, but yes it seems to work fine now but freezes if I connect iPhone , I'm plugging it in the USB port in the back switched it between the two ports, same results. I will check For messages as u suggested.

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Answer 5

Damien6 Author

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May 19, 2012 12:23 PM in response to Damien6

Console crashes when I try to launch . This is pissun me off! I just want to sync my phone! This makes no sense to me.

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Answer 6

BDAqua

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May 19, 2012 1:45 PM in response to Damien6

Do other USB things work fine in that port?

Do you have an AC powered USB hub to plug the iPhone into?

I suspect maybe the iPhone at the moment.

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Answer 7

Damien6 Author

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May 19, 2012 1:56 PM in response to BDAqua

Yes keyboard is fine , I don't think it's the iphone it's almost new 3 weeks!

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Answer 8

BDAqua

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May 19, 2012 2:34 PM in response to Damien6

What version OS is it you're running? 10.5.8 & latest iTunes at least required for syncing them.

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Answer 9

japamac

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May 19, 2012 5:10 PM in response to Damien6

Along with having the proper OS X, iTunes, Safari and Quicktime versions, you should also have USB 2.0.

OS X 10.5.8, iTunes 10.5x, Safari 4.0.3 or later and Quicktime 7.6.4

If you don't have a USB 2.0 PCI card installed in your machine, get one with the NEC chipset.

One like this is fine.

If you are trying to use the iPhone with USB 1.1, then you are going to have problems.

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Answer 10

Damien6 Author

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May 19, 2012 6:35 PM in response to japamac

I'm running osx 10.5.x latest iTunes also not sure about USB but I have always synced

MY other iPhones with no problem , safari and quick time should be up to date installed all latest versions of everything that was available as soon as I replaced power supply, after the update the computer was working well, except for this freeze when ever I connect iPhone. Should I check the memory cards themselves? Reseat them?

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Answer 11

BDAqua

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May 19, 2012 8:03 PM in response to Damien6

The Memory test can really only be trusted if it finds a problem, not if it doesn't find a problem. 😟

Memtest OS X...

http://www.memtestosx.org/joomla/index.php

Rember is a freeware GUI for the memtest ...

http://tech.kateva.org/2005/10/rember-freeware-memory-test-utility.html

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Answer 12

japamac

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May 19, 2012 8:06 PM in response to Damien6

Should I check the memory cards themselves? Reseat them?

Yes.

Memtest X or Rember to test the RAM.

Reseat is also good.

The iPhone 4 doesn't like USB 1.1 much.

after the update the computer was working well, except for this freeze when ever I connect iPhone.

I'd try USB 2.0 PCI. That's how I connect my iPhone 4s, and have connected all iPhones and iPods, to my G4.

Never an issue.

Can't say the same for USB 1.1.......

The above (previous post) linked PCI card is cheap enough.

Want cheaper, try this:

http://www.amazon.com/Protronix®-5-Port-Controller-Card-Chipset/dp/B005JE2U82/re f=sr_1_2?ie=UTF8&qid=1337472141&sr=8-2

The NEC chipset is the desired chipset, regardless of what OS the maker says is compatible.

OS X has native NEC chipset USB support.

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Answer 13

Damien6 Author

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May 19, 2012 10:34 PM in response to japamac

Ok running remember now, have it on maximum loops. I'll stop it after I can't wait anymore, or should I let it go 255 loops? Thanks for the links ,I will, if I have to get the nec. I had an external one but can't find it or gave it away.

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