9 Replies Latest reply: Jul 2, 2013 11:13 AM by BDAqua
joybird Level 1 Level 1 (0 points)

HI.  I have a G5 and I just installed more ram.  Everything was fine until I hooked up my firewire back up drive and the whole system froze.  Now when I try to start the computer all I get are fans spinning out of control.  I have reset the SMU twice to no avail.  I took out the Ram I installed that I got from Crucial, thinking it might be bad, and would just put the system back to the way it was cuz there was Nothing wrong with it before I installed this ram.  Now, I have a mess.  Any suggestions?

 

Jbmmusic


Imac and Powermac G5, Mac OS X (10.4.11)
  • 1. Re: G5 Wont start up fans running high
    BDAqua Level 10 Level 10 (116,475 points)

    Hello,

     

    For safety, anytime the OS can't load the fans go on high.

     

    Any light on the monitot?

     

    Is the power button flashing?

     

    Have you done a PRAM reset, CMD+Option+p+r...

     

    http://support.apple.com/kb/HT1379

     

    In fact, do 3 in a row, takes a bit of time.

     

    Does it boot to Single User Mode, CMD+s keys at bootup, if so try...

     

    /sbin/fsck -fy

     

    Repeat until it shows no errors fixed.

     

    (Space between fsck AND -fy important).

     

    Resolve startup issues and perform disk maintenance with Disk Utility and fsck...

     

    http://docs.info.apple.com/article.html?artnum=106214

  • 2. Re: G5 Wont start up fans running high
    joybird Level 1 Level 1 (0 points)

    Just fixed the problem!!  I replaced the back up battery and wha la!!  Up and purring like a kitten.  Not sure I want to reinstall the new ram I bought though because the probelm began immediately after putting it in.  I took it out, changed the battery and I'm up and running.  I'm scared to change anything, and interestingly enough the ram I bought from crucial was at 5300 speed, but when I installed it before the crash, my G5 was only reading it at 3200.  Any answers as to why??

     

    Thanks for getting back to me on this stuff, I really appreciate it!

  • 3. Re: G5 Wont start up fans running high
    BDAqua Level 10 Level 10 (116,475 points)

    .

  • 4. Re: G5 Wont start up fans running high
    BDAqua Level 10 Level 10 (116,475 points)

    Good work!

     

    Need more info to answer the rest...

     

    At the Apple Icon at top left>About this Mac.

     

    Then click on More Info>Hardware and report this upto *but not including the Serial#*...

     

    Hardware Overview:

     

    Machine Name: Power Mac G5 Quad

    Machine Model: PowerMac11,2

    CPU Type: PowerPC G5 (1.1)

    Number Of CPUs: 4

    CPU Speed: 2.5 GHz

    L2 Cache (per CPU): 1 MB

    Memory: 10 GB

    Bus Speed: 1.25 GHz

    Boot ROM Version: 5.2.7f1

  • 5. Re: G5 Wont start up fans running high
    salmonmouth Level 1 Level 1 (0 points)

    I'm having a similar problem, but with an interesting twist.  I've been searching discussions to see anything that might relate to this.  A couple of days ago my G5 (2.5 - LCS) started to fail during start-up.  Power light on tower came on, sounds of start-up, but no image on display.  I opened up the case, did some cleaning and tried again.  Got the gray apple to appear but no spinner; just stayed on the gray apple image.  Shut down, did some more cleaning, specifically shop vacuumed along the radiator of the LCS.  Turned it on and the operating system loaded completely.  Turned it off and turned it on again and no image.  Tried the shop vac again on the radiator, and the system loads just fine.  So whennever I want to use the G5, I have to go into the case and hold the hose of the shop vac on the radiator for a minute.  I fear my processors are getting old and weary and are not functioning well in the heat.  But if anyone has another theory, I'd like to hear it.  In the meantime, I am going to attempt replacing the processors and LCS.  But for anyone experiencing the "tower on, no picture" phenomenon, I encourage you to try the manual cooling process of holding a shop vac to the radiator inside the case for a minute and see if you have similar results. BTW - I tried to hold shop vac hose to exhaust ports on backside of case - It did not do the trick.

  • 6. Re: G5 Wont start up fans running high
    joybird Level 1 Level 1 (0 points)

    Hi There!  Have patience with me, cuz I'm new to this posting discussion stuff....I answered your posts last night but saw that they never made it here, that is why I sent the quick post today informing that after searching my brain all night while I should have been sleeping, I just decided to change out the battery and I actually had one on hand, and what a simple process and savior!  All has been fine up to this point, and I do plan on returning the ram from Crucial as per my previous post unless you have other suggestion.

     

    Here is the info you requested:

    Hardware Overview:

     

      Machine Name:          Power Mac G5

      Machine Model:          PowerMac11,2

      CPU Type:          PowerPC G5 (1.1)

      Number Of CPUs:          2

      CPU Speed:          2 GHz

      L2 Cache (per CPU):          1 MB

      Memory:          4 GB

      Bus Speed:          1 GHz

      Boot ROM Version:          5.2.7f1

    DIMM0/J6700:

     

      Size:          512 MB

      Type:          DDR2 SDRAM

      Speed:          PC2-4200U-444

      Status:          OK

     

    DIMM1/J6800:

     

      Size:          512 MB

      Type:          DDR2 SDRAM

      Speed:          PC2-4200U-444

      Status:          OK

     

    DIMM2/J6900:

     

      Size:          512 MB

      Type:          DDR2 SDRAM

      Speed:          PC2-4200U-444

      Status:          OK

     

    DIMM3/J7000:

     

      Size:          512 MB

      Type:          DDR2 SDRAM

      Speed:          PC2-4200U-444

      Status:          OK

     

    DIMM4/J7100:

     

      Size:          1 GB

      Type:          DDR2 SDRAM

      Speed:          PC2-4200U-444

      Status:          OK

     

    DIMM5/J7200:

     

      Size:          1 GB

      Type:          DDR2 SDRAM

      Speed:          PC2-4200U-444

      Status:          OK

     

    DIMM6/J7300:

     

      Size:          Empty

      Type:          Empty

      Speed:          Empty

      Status:          Empty

     

    DIMM7/J7400:

     

      Size:          Empty

      Type:          Empty

      Speed:          Empty

      Status:          Empty

     

    I tried adding the 4GB Kit from Crucial @ PC2-5300 and my G5 only recognized it at 3200 which I'm assuming that is what the rest of my ram will run at.  I figured it's best to have 4GB of ram that run at 4200 than 8GB of ram that run at 3200?????  Hence big question number two of the day!  Thanks!

     

     


  • 7. Re: G5 Wont start up fans running high
    joybird Level 1 Level 1 (0 points)

    P.S. Now that I know how to use this site, yes I did all that you mentioned, reset the SMU not the Pram cuz I could never even get to the sound of the Apple Chime........Never saw a screen, just went from silence after turning on.....light stayed on lit white, and then fans spinning out of control.  I'm good to this machine.  Original owner, keep iphoto and itunes on separate external disk.....unit is very well ventilated etc......I just knew I couldn't give up on it.......and just by changing the battery, and doing a little dusting off of things....I'm back and running.  Still wondering if I should attempt at putting the new RAM back in.  I'm probably messing with fate and should leave well enough alone, so this wonderful unit can get me thru till they release the newest of the newest Mac Pro.  Whoa!  Gotta get another job though or win the lottery. 

  • 8. Re: G5 Wont start up fans running high
    BDAqua Level 10 Level 10 (116,475 points)

    Sometimes faster RAM will run a slower speeds, but yes, & the only speed the G5 will run at is PC2-4200, 533MHz, & needs matched oposing pairs...

     

    4-3-2-1*1-2-3-4

     

    One with one, 2 with 2, etc.

     

    DIMM0/J6700:

     

      Size:    1 GB

      Type:    DDR2 SDRAM

      Speed:    PC2-4200U-444

      Status:    OK

      Manufacturer:    Unknown

      Part Number:    Unknown

      Serial Number:    Unknown

     

    DIMM1/J6800:

     

      Size:    1 GB

      Type:    DDR2 SDRAM

      Speed:    PC2-4200U-444

      Status:    OK

      Manufacturer:    Unknown

      Part Number:    Unknown

      Serial Number:    Unknown

     

    DIMM2/J6900:

     

      Size:    2 GB

      Type:    DDR2 SDRAM

      Speed:    PC2-4200U-444

      Status:    OK

      Manufacturer:    Unknown

      Part Number:    Unknown

      Serial Number:    Unknown

     

    DIMM3/J7000:

     

      Size:    2 GB

      Type:    DDR2 SDRAM

      Speed:    PC2-4200U-444

      Status:    OK

      Manufacturer:    Unknown

      Part Number:    Unknown

      Serial Number:    Unknown

     

    DIMM4/J7100:

     

      Size:    2 GB

      Type:    DDR2 SDRAM

      Speed:    PC2-4200U-444

      Status:    OK

      Manufacturer:    Unknown

      Part Number:    Unknown

      Serial Number:    Unknown

     

    DIMM5/J7200:

     

      Size:    2 GB

      Type:    DDR2 SDRAM

      Speed:    PC2-4200U-444

      Status:    OK

      Manufacturer:    Unknown

      Part Number:    Unknown

      Serial Number:    Unknown

     

    DIMM6/J7300:

     

      Size:    Empty

      Type:    Empty

      Speed:    Empty

      Status:    Empty

      Manufacturer:    Empty

      Part Number:    Empty

      Serial Number:    Empty

     

    DIMM7/J7400:

     

      Size:    Empty

      Type:    Empty

      Speed:    Empty

      Status:    Empty

      Manufacturer:    Empty

      Part Number:    Empty

      Serial Number:    Empty

     

    http://eshop.macsales.com/MyOWC/Upgrades.cfm?sort=pop&model=234&type=Memory

  • 9. Re: G5 Wont start up fans running high
    BDAqua Level 10 Level 10 (116,475 points)

    Hello, just to mention, you can feel free to start a new topic to likely get more help on your particular issue.

     

    I doubt a vacumm will remove enough dust, I use a 100psi Compressor to blow the dust out.

     

    Also, your coolant may need replacing, & the thermal paste on the CPUs likely needs replacing, also pay attention to the dust on the Video card, & the fan on it if it has one.

     

    Does it start better if allowed to cool?

     

    Get Temperature Monitor to see if it's heat related...

     

    http://www.macupdate.com/info.php/id/12381/temperature-monitor

     

    Might be time to replace the PRAM Battery, 4 years is close to their lifespan, far less if ever without AC power, & can cause strange startup problems...

     

    See which one your G5 has...

     

    http://eshop.macsales.com/item/Newer%20Technology/CR2032/ 

     

    http://eshop.macsales.com/item/Newer%20Technology/BAA36VPRAM/