maybe you encounter the following issue already.
When deploying the Azure Stack PoC RTM on a HPE Server, the deployment stop without any error or something at step 60.140.149.
After one week troubleshooting together with the customer and no solution, my dear coworker Alexander Ortha gave me an hint what the issue could be.
He previously hab the same issue with an HPE and he needed to update the Firmware and BIOS of the system. Afterwards the installation went through smoothly.
So I tried and he was right. So just try it yourself and update the firmware of your systems to lastest version.