Question about Apple iMac G4 Desktop

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IMAC snaps off during operation Console says cause - 122

My IMAC G4 (five years old) just snaps off sometimes after 10 minutes operation, sometimes a half hour or hour. If left off for a while you can always start it again but it will shut off again after a while.. The last line of console when it does this is " PMU forced shutdown, cause = - 122
What is that and how can it be fixed?

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Sounds like a power supply issue. You will need to take this to an apple dealer and ask them about it. This one is not an easy fix as it is a hardware fault.

Posted on Sep 08, 2008

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Frozen page on imac


Hi Mike,

iMac G5, more than 10 years old now....
sometimes, the new applications on the old Macs just don't work well...

Are you able to get out and start again?
DOes it freez every time?
Have you made sure your up to date, software update...

Honestly, it's time for a new mac...
You can import all your data to the new Mac and it will make your head spin to see the difference in preformace and capacity.

Apr 13, 2013 | Apple iMac G5 Desktop

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Safari doesn't work on this used Imac G4 I just bought, but Camino does work? How do I get Safari working on this old thing?


On the left Top of your monitor is a apple Logo.Tip on it and select "About that Mac" A Window pops up and you select "More Info" it shows you the OSX on it. OSX 10.3 or OSX 10.4 Google "Safari Browser for OSX 10.? " Download it and it will work. You may have the latest Version.

Oct 04, 2010 | Apple iMac G4 Desktop

1 Answer

Imac g4 won't start but shuts down when apple logo appears on screen


Are you sure the iMac is really shutting down or just turning off the backlight? The tell-tale sing would be to let the unit fully boot-up (wait 3 minutes) and the press the button the apple keyboard that ejects the CD-ROM. If the CD-ROM door opens, you iMac is running with disabled or broken backlight.
The inverter circuit on the iMac G4 is known to be weak.
There could be another problem, though. The iMac G4 is also known to have weak internal power supplies. Here's how you can tell:
Hold down the CMD OPT "O" and "F" keys at the same time while pressing the power button. This will tell the iMac that you want to boot into the Open Firmware shell, bypassing the Mac OS X startup. If this works, your power supply is good, the inverter is good and you have a problem with your Open Firmware boot string. To fix the boot string, Power on the unit while holding down the keys CMD-OPT-P-R to zap the parameter RAM (PRAM) and reset everything to defaults.
If you were not able to boot into the Open Firmware shell, your problem is either a failed power supply or a failed screen backlight. The last possible culprit is your iMac could suffer from "Bulging Capacitor Syndrome", where a batch of iMac G4s, iMac G5s another electronics were fitted with a bad batch of capacitors. Eventually, the caps will rupture and cause irreparable damage to the logic board. Only way to verify this is to pull the unit apart and visually inspect. If you see little green or blue cylinders that seem to be bulging or oozing a thick oily goo, that's your problem. Only recourse is to shop around on eBay and look for a replacement logic board.

May 30, 2010 | Apple iMac G4 Desktop

1 Answer

Unable to turn on the computer and power supply is OK because other devices are plugged into it. Tried procedure in apple manual which says to hold down power button and at same time hold down 4 buttons on...


The iMac G4 will refuse to turn on if the logic board battery is dead. Since this model Macintosh is now about eight years old, it's quite reasonable to suspect your battery is dead. Battery replacement is a relatively simple task for a certified technician, but unfortunately the battery in this model is not a user-replaceable part.

Mar 12, 2010 | Apple iMac G4 Desktop

1 Answer

Can I connect my apollo 2250 to my old imac?


OS X drivers for the Apollo 2250 apparently exist only in 10.5 and 10.6, both of which your iMac G4 is too old to run.
If you have this printer attached to another computer on your home network, you could activate printer sharing and allow your G4 to print to it that way.

Mar 11, 2010 | Apple iMac G4 Desktop

1 Answer

Imac g4 lcd black screen replaced pram battery


If you can find an older SVGA monitor, try hooking it up to the port on the back of your mac. If you get video then chances are the LCD display is shot.

Sep 01, 2009 | Apple iMac G4 Desktop

1 Answer

My G4 1.25ghz with 1 gb ram plays abc video slow.


Hello, sorry you are having trouble,
There are so many variables when it comes to Video play back on a Mac..
Yea, 1.25 Ghz with 1 GB of Ram answers most questions, yea, it should play OK,
BUT:
  • Is the video on a CD or DVD ? well, these iMacs don't have a very fast optical drive.
  • How much room do you have on your internal hard Drive, if it's too full ( more than 80% full ) then you will suffer read/write performance.
  • Is the video on an external harddrive, is it a USB drive? the USB on the iMac G4 is USB 1.1, 11Mbit/sec, way too slow to play a big video smoothly.
  • Just what is the size of the video, is it like that for all of them or just one, might it be a HD video with high frame rates?
  • What version of the MacOS X do you have installed? If you installed Leopard 10.5 on the iMac G4, nothing will run smoothly,
  • Are you playing this video over a network? forget it it's got to be on the internal or a FireWire external disk otherwise it will stagger...
Well, there you go, I know, it's so easy to say Hey man, just get a new Mac and everything will be fine... But that machine is going on 6 years old now, Video technology has not stood still.....


Mar 24, 2009 | Apple iMac G4 Desktop

2 Answers

The screen on my Apple Powerbook G4 goes dim and sometimes out.


How long before it goes dim?

Does it start strong, then dims right away?

Feb 27, 2009 | Apple iMac G4 Desktop

1 Answer

Problem with Apple imac Power Supply


The most common problem with imac G4/800's are failing logic-boards. This will cause the mac to not power up at all giving the impression that the PSU is broken. 
If however, you are indeed certain that the fault is with the power supply, they are available from many stores online
Power Supply for iMac G4 15" LCD (700 & 800 Mhz) 661-3184 614-0147

Dec 09, 2008 | Apple iMac G4 Desktop

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