I have a Power MAC G5 dual 2ghz that has a peculiar problem. The monitor will not report until the machine is stopped and started 5 or 6 times. Once booted it will restart without problem if done so from the apple menu. Swapped out all hardware

My Power MAC G5 has a peculiar problem. The monitor fails to report until the machine is started and shut down 5 or 6 times. Once it has booted it can be restarted without incident from the Apple menu. I have swapped out all of the hardware. Monitor, Memmory,Video Card and reset the PRAM. After resetting the PRAM it booted on the first attempt and I thought it was solved. But the next day it was back to starting and stopping until the Monitor came on. Does anyone have a suggestion? Thanks

It could be a bad PRAM battery corrupting your PRAM. Typically when I have monitor issues on startup it is a bad PRAM battery.
Texas Mac Man's PRAM, battery, PMU tutorial - https://sites.google.com/site/macpram/mac-pram-nvram-cuda-pmu-battery-tutorial
Apple's PRAM reset directions - http://docs.info.apple.com/article.html?artnum=2238
If you have a digital multimeter you can check the condition of your present battery. It should read at least 3.2V if it is the 3.6V half-AA battery type. A new battery provides 3.67 Volts DC. A bad battery provides under 3.2 Volts DC. Ideally this should be measured while the battery is under load; added recommendation from Hans777:
>I have recently found out that an exhausted battery will still indicate >3.6 V with a high internal resistance VM.
>
>Checking incircuit: powercord disconnected press PMU reset button for >about 5 sec before measuring.
>
>Checking outside: load the battery with a 1500 Ohm resistor when measuring.
Alternatively, test the battery while it is still in the computer.
If the battery is more than 5 years old, especially if you totally disconnect the computer from the power regularly, or have left it unplugged for several months at one time, it is likely the battery is dead.
Sometimes you have to do a more intensive reset of hardware management:
[Resetting Cuda/PMU on Power Mac G5, Power Mac G4, Power Macintosh G3|http://support.apple.com/kb/HT1939]
[How to reset the SMU on a Power Mac G5 (Late 2004) or Power Mac G5 (Late 2005)|http://support.apple.com/kb/HT1436]
[iMac G5: How to Reset the SMU|http://support.apple.com/kb/HT1767]

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I only have the GeForce 6600LE PCIe card in Slot 1. No AirPort Extreme/Bluetooth card.
I did replace the old PRAM battery (voltage 2.94) with a new CR 2032 and reset the PRAM holding down Command-Option-P-R keys until second boot tone chimed. (A lot of dust in there, but I haven't really cleaned it yet...) After boot, I reset the date / time.
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Dear macpeople,
I have a Power mac G5 dual, 1.8 ghz, ramm 4.5GB. I guess from 2004. Only added more Ram three years ago. Never had any serious problem till a week ago. I have read a lot of similar questions and responses on my problem in this forum but till so far i have not been able to solve it.
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Checked memory
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See if the Disk is issuing any S.M.A.R.T errors in Disk Utility...
http://support.apple.com/kb/PH7029
Open console in Applications>Utilities, check the system log for the date/time of the last problem & the Startup right after that for clues.
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
iStat Menus...
http://bjango.com/mac/istatmenus/
And/or iStat Pro...
http://www.islayer.com/apps/istatpro/
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Check the System Preferences>Other Row, for 3rd party Pref Panes.
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Please check out the following Apple Support article to see if your particular Power Mac model supports an external Wi-Fi antenna.

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Please HELP, I have a fan speed problem with my Power Mac G5 Dual 1.8 GHz PowerPC
This is a NOT an Intel machine. I am running Mac OS X v10.5.8
Power Mac G5 - PowerMac 7,2 - Power PC 970 (2.2) - 1.8 GHz with 2 CPUs - L2 Cache (per CPU) 512 KB - Memory 8 GB - Bus Speed 900 MHz - Boot ROM version 5.1.5b1
I have included below Links to download a sound file (.m4a) that I recorded of the fan speed problem and both a .pdf and .spx files of my system profile.
download sound file
http://homepage.mac.com/rep3/filechute/myG5dualsFans.m4a
down load .spx file of my system preferences
http://homepage.mac.com/rep3/filechute/systemProfileREP3-G5dual.spx
down load .pdf file of my system preferences
http://homepage.mac.com/rep3/filechute/systemProfileREP3-G5dual.pdf
When did the fan problem start?
After I replaced the mother board on the computer.
Why did I replace the mother board?
Because the experts at apple agreed with my diagnosis that the major crash problems & kernel panics must have some thing to do with a logic board gone bad. They would not work on it, because this Power Mac G5 dual 1.8 GHz machine is now a legacy model.
What I have done to attempt to fix my fan speed problem? yes I checked the obvious things, here is a list:
1) yes I checked to be sure that the new mother board was the same part number as the original one, and that all things that were unplugged from the old mother board - were actually plugged into the new mother board.
2) all the fans work, I can see them spinning if I use a flashlight and look at them (cover on and off to get at some of them)
3) check all RAM to make sure: a) it was installed properly b) that the RAM worked using TechTool Pro c) even started the machine with only the original RAM that came with it.
4) I installed a Temperature monitor - to see if there was something reading as very hot inside that was causing the machine to continually run the fans at a high speed. No, no heat issues that I can see. Here are the reading from the sensors in degrees fahrenheit, 2009-10-11 16:11:01 -0500
CPU A Die Temperature: 75.7℉
CPU B Die Temperature: 81.5℉
Drive Bay: 68.9℉
Main Logic Board Air Inlet: 64.8℉
Main Logic Board Ambient: 73.6℉
Main Logic Board Backside: 76.3℉
Memory Controller Heatsink: 93.2℉
Processor Card A Ambient: 77.5℉
Processor Card B Ambient: 77.0℉
5) zapped the PRAM
6) followed the SMU reset instructions for
Power Mac G5 (Late 2004)
To reset the SMU on a Power Mac G5 (Late 2004) computer, simply do the following:
• Turn off the computer by selecting Shut Down from the Apple menu or by holding the power button until the computer turns off.
• Remove the power cord from the computer.
• Wait two minutes.
• Plug in the power cord.
• Turn on the computer.
7) followed the SMU reset instructions:
Resetting the Cuda/PMU
How to reset the PMU:
• If the computer is on, turn it off.
• Disconnect ALL cables from the computer, including peripherals and power.
• If possible, move the computer to a place where you are not standing on carpet.
• Open the case and ground yourself by touching part of the metal frame inside the computer.
• Find the Cuda or PMU button
• Press the Cuda or PMU button ONCE. Do not press the button more than once before starting the computer up again.
• Wait 10 seconds, then reconnect the cables you removed in step 2 and turn the computer on.
• If the computer still does not respond after resetting the PMU, the computer may require service from an Apple Authorized Service Provider.
8) ran disk utilities, repaired permissions
9) found a setting in the system preferences that a chat room person suggested had something to do with fan speed. In Energy Saver, under options, processor performance was set to highest, I set it to automatic - this did not change anything that I could tell - BTW I checked my other G5 (a single processor that works fine) that is the setting that that it is set to, and it is nice and quiet.
10) restarted the machine, ..
11) found a Fan Control System Update - but it did not install when I tryed to install it -
12) booted from OSX install disk and ran that disk utility
13) used OnyX to fix disk permissions, clear caches and temp items
Nope - still have the same high speed fan problem. ... PLEASE HELP!!
I have been reading in the MacInTouch reader reports - found this: some one said to use this - thermal re-calibration using the Apple Authorized Service Providers' disk - but that's not available, at least I can not find it - anyone? have an answer to finding this - or can do it for me? I am in Chicago.

The Genius at the downtown apple store said that because it's a "legacy machine" they would not work on it, .. so should I push them?
Well, I personally think that's ridiculous, I'd Push them, I'd call AppleCare & talk up the chain if need be... there the ones that have or should have that Disc... man o man... Personally I'll never visit an Apple Store again in my lifetime, maybe try an independent AASP if none of that helps!..
http://tinyurl.com/ykomqkn
Man-o-man, pop my cork before I explode on that one, if I had anything to do with it I'd close that store.

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how can i turn down the fan rpm that's between the optical drive and hdd in my power mac g5 dual 2.3?

Ok, I saw that error in your logic. A Dual G5 2.3 or even a Dual Core 2.3 does NOT use LCS at all. Its air cooled and if anything if the OP is experiencing this problems could be due to possible heatsink paste drying up. He might have to re-apply MX 7 or Arctic Silver.
The only G5's that use LCS are: G5 dual 2.5 from Late 2004, the G5 Dual 2.7 from Early 2005, and lastly the G5 Quad-Core from Late 2005-end of September 2006.
Hope this helps.

In addition to my iMac, I have a Power Mac G4 (10.4.11 Tiger) which of course is pre-Intel. I can boot up and use for about 5 minutes before the mouse freezes. I believe something is overheating. What would that be - so I can have repairs done? The

In addition to my iMac, I have a Power Mac G4 (10.4.11 Tiger) which of course is pre-Intel. I can boot up and use for about 5 minutes before the mouse freezes. I believe something is
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<Edited By Host>

Hello USME,
'Tis a common problem on old Macs.
Do as Allan says: open the door and blow out all the dust bunnies. Canned air from Wal-Mart or Radio Shack can be handy (though sort of expensive) especially for blowing through the back of the power supply. A cool Mac is a happy Mac.
Be sure your Mac can breathe. The air intake is on the bottom of the case, so be sure a deep pile rug or too many papers on your desk are not blocking the air supply.
Feel the power supply and the processor with your hand. They should be warm but not hot; if you have to move your hand away, that's too hot!
Check the fan on the power supply, and on the processor if it has one. Take a flashlight and peer in the back of the (Mac) case through the grille; make sure the fan is turning. If it's not, the power supply won't work for long.
Fans are not considered serviceable, though they will succumb to mechanics of determination. A CPU fan is easy and straightforward.
A fan replacement will not cure an already damaged power supply; the PS may already be done for. Used power supplies for a DA are hard to come by, and not especially cheap when found (c.$50). An entire working DA or Quicksilver may often be found for under $100 on eBay, and swapping in your HD is easy and simple... this might be cheaper and more expeditious than repairing an expired DA. Replacing a power supply is fairly easy, but it's a nuisance and requires a 2mm Allen head wrench in addition to the usual #2 Phillips head screwdriver.
In my experience, power supplies and CPUs are about equally likely to fail. There are a few other possibilities, but they are not nearly so common.
Good luck!... Jon

I have a Power MAC G5 dual 2ghz that has a peculiar problem. The monitor will not report until the machine is stopped and started 5 or 6 times. Once booted it will restart without problem if done so from the apple menu. Swapped out all hardware

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