FIX: Server will not shut down when it contains a PCI-e card on 64 bit operating system Print ZTN1798 ID: ZTN1798 This Zetafax technical note applies to: Zetafax 9.1 and later Symptom With a TR1034 PCI Express you will see the following error on Power Down: (NMI: Parity Check/Memory Parity Error) resulting in a Blue Screen. Or the server will simply refuse to power down. Cause The Brooktrout board uses a TI PCIe-bridge which requires a workaround due to a problem " with the PCIe base 1.0a specification with regards to exiting L1 state" . A registry change is needed to keep the board in the D0 state on shutdown, not the low-power D3 state. Resolution Create a new registry entry in the system Navigate to [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\pci] Create a new key called Parameters (if it does not already exist). Create a new String Value called " 104C8231" . Enter this into the value exactly:hex:00,00,00,20,00,00,00,00 Exit out of the registry. The system should function normally. Status This is a known issue by Dialogic for PCI Express boards on 64bit systems. Last updated: 22 June 2010 (WC/MW) Keywords: Server blue screen shut down