So when i am trying to power on the server its starts does the security check and then comes to "initilizing firmware interfaces..." and then gets stuck. After few seconds it shows the yellow screen which is NMI message saying this :

PowerEdge R740xd - BIOS 2.26.1PowerEdge R740xdBIOS Version: 2.26.1¡DRACIPVA⋅ 197 168 92 20.A system restart is required. The system detected an exception during the UEFI pre-boot environment. Check serial output or iDRAC debug logs for detailed information.Type: Non Maskable interrupt (02) Source: Hardware on BSPRAX=00000000003FA7CA REX=0000000000000002RSI=0000000062BEA102RDI=0000000000000201RCX=0000000000000508R10-0000000065D00958R14-0000000062BE0A28RIP=00000000562A4BD7LastMsg:RDX=0000000000000508R11-00000000003FA7C2R15-0000000000000200 Flags=00000246R8-0000000000000017R12-0000000062BEA102RBP-000000006304E910R9-0000000000000001 R13-0000000000000001 RSP=0000000052AB9BC0CurrentTPL = 08, LastEventTime 000042D5E662LBRfr2 562A4076 Metronome.efi +001076 LBRfr1 562A4083 Metronome.efi +001083 LBRto1 562A4B9E Metronome.efi +001B9E LBRfr0 562A4BB1 Metronome.efi +001BB1 LBRto0 562A4BCB Metronome.efi +001BCB -->RIP 562A4BD7 Metronome.efi +001BD7s00 562A4D2D Metronome.efi +001D2D s01 562A490C Metronome.efi +00190C s02 562A49CC Metronome.efi +0019CC s03 562A38E5 Metronome.efi +0008E5 s04 52ADF1BB DxeCore.efi +0241BB s05 52ADF29B DxeCore.efi +02429Bs06 50DA62AB Unknown (ngkkh) +0122AB Avago EFI SAS Driver s07 50DA8F0C Unknown (ngkkh) +014F0C Avago EFI SAS Driver s08 51390772 DiskIoDxe.efi +002772s09 51390E69 DiskIoDxe.efi +002E69s10 513B2785 PartitionDxe.efi +001785

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I have tried restarting several times. also tried disabling integrated RAID controller from iDRAC but the job didn't get completed. 
can you please help in this issue. I am facing the same issue in 4 server servers. <To protect you, your private information was removed from public view. All private data was saved to your private Case. DELL-Admin> 
iDRAC firmware version : 7.00.00.183