Forums
New posts
Articles
Product Reviews
Policies
FAQ
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Menu
Log in
Register
Install the app
Install
Forums
Apple Computing Products:
macOS - Desktop Hardware
G5 fan problem after cooler disassembly.
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="DeviousDan" data-source="post: 1016405" data-attributes="member: 86454"><p>Hi All,</p><p></p><p>Got a dual 2.5Ghz G5 (PPC) here that runs as our server. </p><p></p><p>I got here (work) after the weekend to find it howling away and unresponsive. After investigation i discovered the system was overheating as the coolant from the water cooling system had been slowly leaking. Anyways i took it to a apple service centre and they quoted me $1700 to replace the cooling unit (haha), and they told me they could not be repaired.</p><p></p><p>I chose not to listen to them and disassembled the unit myself and repaired it with about $50 worth of equipment (but that's another story...)</p><p></p><p>Anyways after reassembling and starting up the fans have always run full blast. You might instantly think "That's because you didn't fix the cooling problem, they're still overheating!".. you'd be wrong. Temperature on CPU dies is 36c idle, can get to 50c under load. These temps are not high.</p><p></p><p>Now I've tried resetting the PRAM, changing the energy settings to "reduced" performance and tried resetting the PMU.</p><p></p><p>I've also tried to boot into open firmware with cmd + alt + O + F, but this does not work, the screen stays blank and the computer requires a reboot. I'f i could boot to OF then i may be able to reset NVRAM but who knows if that would help.</p><p></p><p>I can only think that removing the CPU's makes the mac think that the CPU's may have been replaced and as it doesn't know the specs of the possibly new CPU's it just overcompensates with cooling.</p><p></p><p>I'm at a loss here for things to try, the G5 functions beautifully apart from the fact it sounds like a jet engine. I would really appreciate some help before i go crazy from the noise.... <img src="/mac_images/images/smilies/Embarrassed.png" class="smilie" loading="lazy" alt=":[" title="Embarrassed :[" data-shortname=":[" /></p></blockquote><p></p>
[QUOTE="DeviousDan, post: 1016405, member: 86454"] Hi All, Got a dual 2.5Ghz G5 (PPC) here that runs as our server. I got here (work) after the weekend to find it howling away and unresponsive. After investigation i discovered the system was overheating as the coolant from the water cooling system had been slowly leaking. Anyways i took it to a apple service centre and they quoted me $1700 to replace the cooling unit (haha), and they told me they could not be repaired. I chose not to listen to them and disassembled the unit myself and repaired it with about $50 worth of equipment (but that's another story...) Anyways after reassembling and starting up the fans have always run full blast. You might instantly think "That's because you didn't fix the cooling problem, they're still overheating!".. you'd be wrong. Temperature on CPU dies is 36c idle, can get to 50c under load. These temps are not high. Now I've tried resetting the PRAM, changing the energy settings to "reduced" performance and tried resetting the PMU. I've also tried to boot into open firmware with cmd + alt + O + F, but this does not work, the screen stays blank and the computer requires a reboot. I'f i could boot to OF then i may be able to reset NVRAM but who knows if that would help. I can only think that removing the CPU's makes the mac think that the CPU's may have been replaced and as it doesn't know the specs of the possibly new CPU's it just overcompensates with cooling. I'm at a loss here for things to try, the G5 functions beautifully apart from the fact it sounds like a jet engine. I would really appreciate some help before i go crazy from the noise.... :[ [/QUOTE]
Verification
Name this item 🌈
Post reply
Forums
Apple Computing Products:
macOS - Desktop Hardware
G5 fan problem after cooler disassembly.
Top
