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Unable to boot without Dedicated Graphics card

I am able to boot into Windows just fine, whether I am plugged directly into the mobo, or my GTX graphics card. Either way I use HDMI.

When I try to boot after removing the graphics card, I am completely unable to boot, just plugged into HDMI on the mobo.

When I DO try to boot this way, the machine gets stuck in a reboot loop with no errors, as soon as booting begins for the main hard drive, an SSD, the machine immediately reboots.

Steps tried:

-resetting bios to default

-uninstalling nvidia drivers

-making sure Intel HD graphics driver is installed correctly, it is

-booting with just VGA-booting into safe mode

-Enabling and disabling multi monitor support

- selected IGFX under Primary Display in Bios

All steps failed to resolve.

I have a suspicion that the graphics controller on the mobo is the cause? or the settings or driver related to it? why would I otherwise need a dedicated card plugged in to boot through Intel HD Graphics 3000 with HDMI plugged into my mobo?

My setup:
OS Name Microsoft Windows 7 Home Premium
Version 6.1.7601 Service Pack 1 Build 7601 x64
Main drive: 256GB SSD
Graphics Card: EVGA Nvidia GTX 970
Motherboard: Asus P8Z68 PRO/GEN3
CPU: Intel i5-2500K / iGPU Intel HD Graphics 3000
Monitor: Single ASUS 1080p, connected with HDMI

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All Answers

Collapse -
I've seen that.

In reply to: Unable to boot without Dedicated Graphics card

What I saw was a completely working operational PC that would "boot loop" if we unplugged the GPU.

Fixes have been:

1. Uninstall the GPU's drivers (The Nvidia, use this tool. )
2. Wipe out and start over with the OS.
3. Boot Safe Mode and remove the Nvidia in device manager, etc.

Collapse -
In Reply

In reply to: I've seen that.

I have tried steps 1 and 3, confirmed that, using Intel HD Graphics 3000 in safe mode, that the tool you suggested had removed all Nvidia drivers and files, and the listing was removed from device manager. Unfortunately, after then rebooting with no Nvidia card plugged in, the reboot loop comes right back.

Are there any other possibilities than reinstalling Windows?

Collapse -
Safe mode and...

In reply to: In Reply

Head to MSCONFIG and disable all items. You can re-enable one by one to see what it was.

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