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I have a Dell PowerEdge R740 with 2 Xeon processors and 2 X 8GB DIMMs in slots A1 and B1. One DIMM went bad (B1) so we replaced it. It hangs as soon as it gets to the windows black screen with blue logo. No spinner.
If I remove the DIMM in B1 it boots fine with only 8GB RAM in A1.
If I place 1 DIMM in A1 and 1 DIMM in A2 it hangs in same place.
It will boot to a USB (Linux Distro and WinRE) with both DIMMs (A1, B1) and we can see and test the memory with Windows Memory Diagnostic and it all looks good.
Dell sent a tech out who replaced both DIMMS, same thing. Then they replaced the motherboard. Same thing. Swapped processors, same thing. They're saying since it all works fine from USB boot that it's an OS issue.
There are no Memory dumps being generated that I can find.
Any ideas?
Thanks, - Travis
We needed to clear BadPages memory flag in registry.
https://learn.microsoft.com/en-us/windows-hardware/drivers/whea/how-to-manage-the-pfa-memory-list
[ANSWER]
We fixed it. We needed to clear the BadPages registry flag.
https://learn.microsoft.com/en-us/windows-hardware/drivers/whea/how-to-manage-the-pfa-memory-list
After booting with 1 DIMM and deleting the registry entry we were able to boot with 2 DIMM.
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Hello
Is it available to boot with safe mode?
According to the symptom, the issue is related to the ram physical numbers. It is really hard to take it as a system issue.
A reinstallation test may be a quick way to verify whether this is a system issue or hardware issue.
Wesley, Thank you for your response. We were not able to boot to safe mode with both DIMMs in. We were able to boot up with 1 DIMM (8 GB of RAM) and clear the Registry Entry that had flagged the memory as bad. We probably could have cleared it with BCDedit as well. We were then able to put the second DIMM in and boot normally. The linked article describes having to do this but I don't think it's supposed to hang unless you do.