Part 4: Setup WinDBG as a server to solve BSOD

Part 1: Setup WinDBG as a server to solve BSOD -- What is WinDBG?

Part 2: Setup WinDBG as a server to solve BSOD -- Download and install WinDBG.

Part 3: Setup WinDBG as a server to solve BSOD -- Configuring WinDBG

Part 4: Setup WinDBG as a server to solve BSOD -- Troubleshooting if dump file is not generating

Part 5: Setup WinDBG as a server to solve BSOD -- Setting up as WinDBG as a Server

Part 4: Troubleshoot if dump file not generating.

There might be some unexpected reboot you might found but does not find dump files, for troubleshoot check system debugging information, it is set correctly, sometimes dump file located on partition (could be separate HDD) fails or does not have enough space or if the partition hosted on network drive and Ethernet card or iscsi/HBA device fails.

Check link for more info http://support.microsoft.com/kb/130536.

Or sometimes WinDBG is not able to give you root cause, check you symbol files path, check internet connectivity. Also check if some has powercycle server. These are the some of possible reasons.
check this link as well:

http://support.microsoft.com/kb/949052

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