Hoo boy. That is why we love Gateway so much.
If it is the exact same board (and I can't stress enough how important the word EXACT is) then Gateway must have the original ROM file on the website (where you got the upgrade ROM).
Do you still have the old motherboard? That is the safest, surest way to compare the 2 part numbers.
I dont know if this will help you but thought it worth mentioning.
I have an ASUS M4A785-M MB and an AMD Phenom II x4 950 Black Edition Deneb 3.0 MHz Socket AM3 processor and recently upgraded to an HD 6950 video card. When I installed the CCC for the new video card, I lost the two onboard monitors.
Long story short, I re-installed my W7 using the upgrade option and regained the onboard monitors.
CMM
I don't still have the old motherboard, but I did compare not only part numbers, but the layout such as the amount of capacitors, the positioning of the SATA and RAM slots, and so on. It was the same as the old one.
I did flash the BIOS with secondary graphics card in the PCI-E 16x slot, would that have something to do with what I am experiencing?
But then wouldn't I at least be able to use the monitors using a Ubuntu 12.04.1 LTS Live USB if I installed CCC and nVidia drivers (which I have tried)?
The BIOS flash should not be affected by the secondary video card. To the BIOS it is just another device.
And yes, the Ubuntu test should rule out an OS or driver problem.
You still need to find the original BIOS (ROM file).
I came here from a link in your other thread about flashing with a modified BIOS file. I've skimmed though this thread so it I ask something that has already been asked my apologies. Did you look though the BIOS options for a setting that disables the onboard Video? Or a setting that sets what video device to use? For example my motherboard has an option where you set what order the motherboard looks for a video card. PCIe, PCI, Int. Some motherboards will automatically disable the onboard as soon as an add-in card is detected, did you try removing your add-in video card. I've gone to many different web sites for downloads for various motherboards. They all listed multiple BIOS ROM files, old and new. It shouldn't be that hard to find the original BIOS that board came with. And no, the BIOS doesn't care whats plugged in to the PC when you flash it. The worst that happens, other than a failed flash, is it gets set back to the fail safe defaults.
Well, I removed the secondary graphics card and turned it on and, surprise, the on board graphics card started working. So I replaced the secondary graphics card and now it won't work. I can't find any options in the BIOS for it, other than "UMA Buffer Size", which is set to Auto. Any ideas?
Thats normal operating procedure for a lot of motherboards. You can't use both at the same time, the onboard is most likely automatically disabled when a dedicated video card is detected. You need hybrid SLI or similar to be able to use both at the same time. Once you plug in the dedicated card you'll have to move your monitor(s) to that card.
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