For work, I have deployed about 40 D945GCLF boards of different models and bought in different batches (about 5 or 6 of the more recent ones are 2D). Of these, at least 5 consistently fail to power back up after loss of power. After applying power, the fan will spin about two revolutions but then stop. The board will always power up if the power jumper is shorted, but that's no good for me since these computers are not generally accessible in my deployment.
I am using a consistently failing D945GCLF2D for testing. I have tried replacing all components on the board with ones from working units (3 different power supplies, memory, power cables). I have tried unplugging all peripherals (and monitoring the power LED). I have also tried toggling every setting in the BIOS that I can imagine might matter. I have upgraded to the latest BIOS (182). Nothing I have tried has worked.
Many of our failing boards came in certain batches and most of our other boards work perfectly. I am convinced that this is a manufacturing defect. I am going to see about getting warrantee replacements but I was hoping for a BIOS fix so I don't have to recall all the ones I've sent out into the field. I would not recommend this board for any application where the power needs to come back on after a power failure.
Found a solution, but not a good one. One of our latest batches had 6 out of 10 not working, so our technician called the vendor. The vendor somehow figured out that if you connect a 22uF capacitor across the power jumper, the board will turn on as expected after power loss. We are using a 22uF non-polarized cap. A polarized cap is probably ok if you get the polarity right. According to the manual, pin 6 is positive and 8 is ground. We are sticking the cap in a 2 pin header so our techs can plug it onto boards in the field.
This solution probably voids any warranty, use at your own risk.
The intel manual:
Pic of our solution:
I've one of these desktop boards (D945GCLF2) updated with bios version 0229 (LF0229P.ISO available at http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&ProductID=2926&DwnldID=17969&lang=eng).
In fact the machine does not power up after power failure even if bios is setup as stated in the original post.
Is this an hardware defect or something fixable by updating the bios ?
I contacted Intel support and the tech with whom I spoke said that they had no records of hearing anything about any problems similar to this. This is what he suggested:
To begin troubleshooting of your particular system set-up, I'd recommend the following:
Restart the system into BIOS by pressing <F2> during the boot process. Once in the BIOS setup utility, press <F9> to restore BIOS default settings. Reset any customized BIOS settings. Clear all DMI event logs by setting the option to "Enable", which is located in the Advanced/Event Log Configuration section of the BIOS Setup utility. Press <F10> to save the new settings and reboot the system.
If the problem continues, please, contact us back.
If the problem continues, please, still, proceed updating the BIOS to 0229 version:
Note: Once the update is done, please, restart the system into BIOS and repeat the following:
Press <F9> to restore BIOS default settings. Reset any customized BIOS settings. Clear all DMI event logs by setting the option to "Enable", which is located in the Advanced/Event Log Configuration section of the BIOS Setup utility. Press <F10> to save the new settings and reboot the system.
I am in the middle of some testing of indeterminate length, so I can't try this right away, but maybe someone else can give it a shot and see if it works. The thread on experts-exchange seemed to indicate that the problem was BIOS version independent though.
No dice on the above working. Here is a summary of behaviors:
- power cord unplugged from unit with unit running, units DO NOT power up when plugged back in.
- building electricity lost with unit running, units power up when it is restored.
- power cord unplugged from wall with unit running, units power up when it is plugged back in.
- power cord unplugged from unit when powered down, units power up when it is plugged back in.
- power cord unplugged from wall when powered down, units power up when it is plugged back in.
I did get an email back stating that they had escalated the issue to their research department.
In emailing back and forth with Intel CS and trying to give them as much info as possible and testing all of our boards, I did notice something.
All of our boards with the problem are board version AAE46416-104 while those without the problem are AAE46416-103.
Can anyone else verify that the same is true for them? I used the Intel Board ID utility to find this info.