Max fan issue / crashing

Nitro1

macrumors 6502
Original poster
Apr 16, 2009
302
0
I have a 2008 mac pro that from time to time it will go to sleep and when i wake it up or it does it weird random wake up the computer will freeze up and max RPM the fans and you can not do anything about it until you either pull the power or hold down the power button.

Here is what i have tried

New HD for the OS drive.
Erase OS and Reinstall.
New HD from SSD

I installed new ram about 3 months ago and this has just become a problem in the last month. I did have a older SSD stop working suddenly on me so i replaced it with a new one and now i am having this issue.
Also from time to time the finder / dashboard will freeze and I need to again hard reset the computer to get it to work again.

Does anyone have any ideas why this is happening to me?

Thank you
 

Nitro1

macrumors 6502
Original poster
Apr 16, 2009
302
0
Maybe I am missing something, but i have never seen or done anything with a sensor wire for a HD. The drives slide into the motherboard on the frame slides if that helps at all. I have tried the diagnostic but i am unable to get into the diagnostic screen. I will keep trying.
 

Nitro1

macrumors 6502
Original poster
Apr 16, 2009
302
0
OK well I am going to install my original Leopard OS X onto a flash drive and try to boot from that and see if that will let me do the diagnostic.
 

rigormortis

macrumors 68000
Jun 11, 2009
1,813
229
if the drive shipped with an optical disk then you need one of those disks and hold down the D key
if it shipped without an optical disk then pressing the D key might load it from the hd

try holding down D on every os x disc that came with the computer.
try holding down option D
try holding down option command d

try going to https://github.com/upekkha/AppleHardwareTest to get the CD , if you do not have one

if there is something wrong with the fans and clearing pram and smc does not fix it, then it should fail apple hardware test.
 

Nitro1

macrumors 6502
Original poster
Apr 16, 2009
302
0
Ok i finally got the test to run. Going to bed it will take a while it looks like.

Thanks for the help
 

haralds

macrumors 65816
Jan 3, 2014
1,039
271
Silicon Valley, CA
I have a 2008 mac pro that from time to time it will go to sleep and when i wake it up or it does it weird random wake up the computer will freeze up and max RPM the fans and you can not do anything about it until you either pull the power or hold down the power button.

Here is what i have tried

New HD for the OS drive.
Erase OS and Reinstall.
New HD from SSD

I installed new ram about 3 months ago and this has just become a problem in the last month. I did have a older SSD stop working suddenly on me so i replaced it with a new one and now i am having this issue.
Also from time to time the finder / dashboard will freeze and I need to again hard reset the computer to get it to work again.

Does anyone have any ideas why this is happening to me?

Thank you
I presume, this is a 3,1? I see the same issue. No resolution so far.
 

Nitro1

macrumors 6502
Original poster
Apr 16, 2009
302
0
Here is the results of the test. I am hoping someone can tell me what i need to do.

It says it found a Hardware error and shows

4MEM/9/40000006: B:1 C:1 R:0

So I assume i have a bad ram stick but how do i know which one is bad?

Thank you
[doublepost=1461616279][/doublepost]
I presume, this is a 3,1? I see the same issue. No resolution so far.
You are having the exact same issue? Do you think it is a software update that has caused this?
 

orph

macrumors 68000
Dec 12, 2005
1,861
381
UK
iv had ram problems, pulled all the ram and reinserted it and it worked for me.
if you do have a bad ram stick pull all but 2 sticks of ram then see if your pro works if so then insert 2 more sticks of ram test and so on.

i think i just had some ram i bumped when dusting so it was not correctly inserted, also once after inserting new ram i had problems pulled it and noticed some dust in the slot after using air to get it out put the ram in and it worked.
do get the ram instructions from the apple site and check you have it correctly placed too