Things to try before a HD erase

Hi everyone--
I'm having a myriad of problems with my iMac G5 (latest pre-iSight) which has never really happened with any Mac I've owned.
Problems:
---Freezes (yeah, it's like OS9 or Windows-- its frustrating)
This happened three times as I tried to post this message from there (I'm on my iBook now-- thankfully I'm a geek with two computers)
---The computer itself whistles (can't describe it any better) from time to time, not often
---Speakers pop and loose sound until sound is adjusted
---Won't sleep naturally (i.e. without me explicitly putting it to sleep), frequent but not continuous
---Very, very slow from time to time
---Clicks (possibly the HD) like a really loud clock about five times a day, three days a week
So... what I need to know is what I can do to try and remedy these problems before I resort to a clean wipe of the HD.
Here's what I've done:
Repair HD with AppleCare CD
Fix permissions
Reset PRAM/NVRAM
Reset PMU
Unplug everything but the keyboard/mouse
Nothing seems to be helping at all. Is there anything else I should try before erasing the HD or sitting on AppleCare?

Hi, i.T.i.
I suggest following these general iMac G5 troubleshooting steps, a couple of which you have already tried:
1. See if your computer's serial number is in the range specified in the "iMac G5 Repair Extension Program for Video and Power Issues" document.
2. Rule out potential hardware problems. Run the Apple Hardware Test that came with the computer. Instructions for doing so will be found in the hardcopy manual that accompanied your computer. For additional details, see my "Apple Hardware Test" FAQ.
3. Check the diagnostic LEDs, a feature of your iMac G5. See "About the iMac G5 diagnostic LEDs."
4. If your iMac G5 will not turn on, see "iMac G5: Troubleshooting when your computer won't turn on."
5. See also the iMac Service & Support site.
6. Check the iMac G5 Discussions for similar reports from other users.
7. As a general check, run the procedure specified in my "Resolving Disk, Permission, and Cache Corruption" FAQ. Perform the steps therein in the order specified.
8. If the computer is either under warranty or covered by an AppleCare Protection Plan, don't hesitate to take advantage of your warranty and contact AppleCare.
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X
Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
I may receive some form of compensation, financial or otherwise, from my recommendation or link.

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    Mega PC barebones optical drive compatibility list
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    Club3D Radeon AIW 9800 PRO
    ATI Radeon ALL-IN-WONDER 9600 XT
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    AOPEN Aeolus 5900XT 128 Mb
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    MEGA 651 =

    Quote
    PROCESSOR SUPPORT:
    The official list of supported CPUs can be found here:
    http://www.msi.com.tw/program/products/slim_pc/slm/pro_slm_cpu_support_detail.php?UID=431&kind=4
    Basically the ageing SiS651 chipset does not support Celeron / P4 cpus above 533mhz, and does NOT support the newer "Prescott" core cpus
    Celeron > 400Mhz FSB
    P4 Northwood > 533mhz FSB (512kb L2 cache)
    your processor is not supported. please start a new thread if you need help

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    Buy a dollar pack of cable ties and go to work-----make sure ALL cables are away from the front of the intake fan for the CPU----you want a very clear path to the cooler.  Less clutter---better airflow.  Better airflow----lower temps.
    CPU INSTALL:
    Get rid of the MSI thermal grease with some Goof Off or acetone-----and get some good Arctic Silver 3, AS5 or AS Ceramique.  Clean both the chip top and the bottom of the HS with denatured alcohol before applying the thermal grease.  You might also want to lapp the bottom of the HS which is not very well done----but I found it not necessary.  The HS/Fan unit is very easy to install----just rotate your screw down points as perscribed by the sticker on the cooler----don't tighten one screw all the way down----then go to the next.
    DRIVERS:
    I found the drivers on the install disk to be non-functional---- get the latest drivers from the MSI website (you can use Live Update for this) or go to http://www.nforcershq.com and get the latest Nforce2 Driver Remix from Morpheus1 or Mwarhead.
    DO NOT use the Nvidia SW IDE driver (say "No" when it asks you in the driver install)  Only use the ITB (In The Box) IDE driver----it's the default driver.  Your Optical device will probably not function correctly (eject, etc) with the Nvidia SW IDE driver.
    Nforce2 SoundStorm Drivers are a tricky topic----there are TONS of versions out there.... I've had the best luck so far with Drivers 4.31 (Off Microsoft Windows Updates---it was a Driver Update) and Audio Control Panel 4.31.  Nvidia has a driver update package now JUST for audio-----posted Here
    If you are having problems with Media Center III crashing----it seems to be a conflict between the SoundStorm Drivers and Media Center III,  Uninstall your Nvidia audio devices in the device manager (Three of them----there is one hidden---so go to view and "show hidden devices")  then reboot and let Windows rerecognize your devices and reload drivers.  This will solve most problems until Media Center II has another bad crash----in which case---you may have to do this procedure over again.  You can tell if it's really hosed up because the radio sound will come on automatically at boot----or you will have lost the SoundStorm Control Panel Icon in the SysTray.  I'm working on different versions of SoundStorm to see which works best---will update if I find anything new.  (Update)----4.31 seems to be the best but I still can'ttotally eliminate the crashing in Media Center III.
    Once you get your Lan device up and running (or your modem) Go to Windows Update and make sure you are completly updated with all latest window updates---If using WinXP-----you need to be at WinXP ServPack 1a when you are done.
    Use Windows Cleanup and Defrag when you are done----ESPECIALLY cleanup---to get rid of any left over temp files in the Mega----To get the BEST and most optimised defrag----run windows defrag at least three times in a row----maybe more----it will REALLY optimise the drive.
    TV CARD:
    The main TV Card designed for the Mega 180 is the MSI 8606-40 Mega TV Card----be careful to get it vice the other version of the MSI 8606 which is the MSI 8606-10 TV@anywhere Master.
    The Mega TV Card does not include a Radio while the 8606-10 DOES include a radio.  Since your Mega 180 already has a radio----you absolutely don't need or want the 8606-10 TV@anywhere Master.
    Do NOT use any drivers or software you receive with the Mega TV Card MSI 8606-40----just set the disks aside.  You will ONLY uses the drivers off the Mega 180 Install Disk.
    The Mega TV Card MUST be installed before the menu item for "Install TV Tuner Drivers" becomes visible on the Mega 180 install disk.
    Make sure your TV Card is hooked into the line called "Remote Control" within the Mega 180 itself----there is a small 3 inch connecting wire in the TV card box.
    The TV and Radio function well with the remote----but you must have MSI Media Center III installed.  I could not get the TV or the Radio to work without Media Center III.
    Upon initial setup of the TV within Media Center III---you may have to switch the source between cable and antenna to get the initial channels to auto scan.  Once done auto scanning---switch back to cable as source (assuming you have cable).
    Using the remote to force the TV screen to full screen:  When you use the up/down arrows on the remote----watch the menu items on the screen----the various menu item buttons will highlight as you hit the arrows.
    Once you have highlighted the little arrow button on the lower right of the screen----just below the TV display (it will turn green)----hit the ENTER key
    It goes to widescreen----hit the ENTER key again------it goes to fullscreen
    BTW, the remote works fine-----the trick is you HAVE to have Media Center III installed and available to be called for it to control the TV Card----Radio Etc.  It will start up normally when you push the TV button on the remote.
    BIOS SETTINGS:
    The defaults will mostly work.  One thing----to get BEST performance out of the NForce 2 Onboard video----set AGP to 128 and Set Frame Buffer to 128----I had crashes with almost any other video setting.  I'm still playing with PCI clock, voltages, and some other settings to get better stability-----will let you know.....
    6 CHANNEL SOUND
    Use all three ports in the back of the Mega 180 and then configure it using the SoundStorm Control Panel----Use the "Speaker Setup Wizard".  Check and adjust using the "Test Tone" button.  I'm using an inexpensive set of Analog Altec Lansing 5.1s----the sound is excellent.
    That's all for now----tell me what else you've found and I'll post.
    John

    My MSI MEGA 180 has a strange display on the monitor.
    I opened the boxed removed all items.
    Installed the CPU (supported on the CPU compatability list for the MSI MEGA 180), installed the heatsink & fan.
    Installed the HD drive.
    Installed the MSI DVD+/-RW
    Installed 1 DIMM module of DDR RAM PC2700 333MHZ 1GB
    Pushed the Power button for the PC and the desplay is corrupted.
    I tried the 4 possible configurations for Jumpers 7 and 8 to alter the FSB speed with no luck.
    I also tried the 4 different J7 and J8 configurations without having the HDD and DVD-RW drives connected - same result.
    I also tried the 4 different J7 and J8 configurations with the Secondary VGA output connected to my monitor.
    I also tried the 4 different J7 and J8 configurations with the S-Video output connected to my TV and no signal at all.
    Both my monitor and HDD work fine with my other PC.
    I noticed the jumper pins are not numbered - made the configuration job a bit more tedious.
    Please note the LCD screen works correctly, however the redio tuner in HiFi mode doesn't pick up any local stations.
    As I am a Software Test Engineer, I am 100% confident I have checked all possible configurations including clearing the CMOS, but the system simply will not display to the VDU. The POST should at least be visible when Power is turned on for the PC mode.
    NOTE: I will update the RAM Brand as soon as I find out the title from the supplier, but I believe it is OEM.
    NOTE II: this is the URL to the CPU used: http://www.excaliberpc.com/product_info.php?products_id=1798
    PLeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeesssss ssssssssssssssssssssssseeeeeeeeeeeeeeee eee  help ease my pain!!

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