I've run into an iMac that is having a variety of problems.
iMac 8.2 (G5) from around 2005
-On some boots the screen is blank and the system beeps three times, then the fans run full blast and nothing happens.
-Some boots will give the classic kernel panic screen over the apple logo (white screen) and stop.
-Occasionally the system will boot, but a black box appears centered in the screen and says you must restart by holding the power button down.
-If I try to reinstall the OS, I get to various parts of the installation, but it always freezes or has the black box error before the install can finish.
-The fans turn on full blast after almost every freeze, crash, or failure. (don't know if this is typical.
What I've already tried:
-Reseting PRAM
-Reseting NVRAM
-Reset-all through open firmware boot
-Used two different sticks of RAM from a working system, with the same results
-Tried a brand new hard drive + different RAM with same results
-Boot with only RAM, no hard drive. Boot to installation disc. This results in kernel panics on boot, or as the install disc is load. It shows a blank black box in the center of the screen. Occasionally, it just freezes.
After inspecting the system for damage, I found a couple of parts that were corroding. See the images below
This is the cpu heat sink. The fins are corroding where they attach to the main plate.
Educated guess:
I'm thinkin' maybe the corrosion impedes the ability to properly cool down the cpu, causing the system to have errors, and turn the fans on.
Question for my forums peeps:
Do you think that this corrosion is part of my problems?
![cpuheatsinkcorrosion.jpg]()
These parts are next to the CPU. They're leaking through the top. After I scraped off the leakage, I noticed the tops of the components are not level like the others. It looks like when you stick a soda in the freezer and the top explodes. Like there was a lot of pressure inside and it tried to escape. Ok, it doesn't look as bad as an exploded soda can, but it doesn't look like it's sister components. The tops look like the letter 'K' and the leakage is from the center of the 'K'.
Question for forum:
Do you think this is part of my kernel panic / freezing problems?
![leakage1.jpg]()
![leakage2.jpg]()
iMac 8.2 (G5) from around 2005
-On some boots the screen is blank and the system beeps three times, then the fans run full blast and nothing happens.
-Some boots will give the classic kernel panic screen over the apple logo (white screen) and stop.
-Occasionally the system will boot, but a black box appears centered in the screen and says you must restart by holding the power button down.
-If I try to reinstall the OS, I get to various parts of the installation, but it always freezes or has the black box error before the install can finish.
-The fans turn on full blast after almost every freeze, crash, or failure. (don't know if this is typical.
What I've already tried:
-Reseting PRAM
-Reseting NVRAM
-Reset-all through open firmware boot
-Used two different sticks of RAM from a working system, with the same results
-Tried a brand new hard drive + different RAM with same results
-Boot with only RAM, no hard drive. Boot to installation disc. This results in kernel panics on boot, or as the install disc is load. It shows a blank black box in the center of the screen. Occasionally, it just freezes.
After inspecting the system for damage, I found a couple of parts that were corroding. See the images below
This is the cpu heat sink. The fins are corroding where they attach to the main plate.
Educated guess:
I'm thinkin' maybe the corrosion impedes the ability to properly cool down the cpu, causing the system to have errors, and turn the fans on.
Question for my forums peeps:
Do you think that this corrosion is part of my problems?
These parts are next to the CPU. They're leaking through the top. After I scraped off the leakage, I noticed the tops of the components are not level like the others. It looks like when you stick a soda in the freezer and the top explodes. Like there was a lot of pressure inside and it tried to escape. Ok, it doesn't look as bad as an exploded soda can, but it doesn't look like it's sister components. The tops look like the letter 'K' and the leakage is from the center of the 'K'.
Question for forum:
Do you think this is part of my kernel panic / freezing problems?
