I have an Asus M11AD PC (Windows 10). It works fine, but I wanted to support 3 monitors, so I bought an EVGA GeForce GT 720. The Asus Power Supply is only 300 Watts, and I chose the EVGA GeForce GT 720 as a low-power graphics card with multiple positive reviews for supporting 3 monitors, and I don't need high performance (little or no gaming, occasional HD video watching, but mostly text and low to medium-res graphics).
 
Installing the card, I noticed that the only slot(s) available were longer than the connector on the card, but I found some instructions online that indicated it should still work. I seated the card as per instructions, then started up the PC, and there was no video output at all from the graphics card. I tried reconnecting to the on-board video (VGA) and restarting, but got no video from that, either. Totally blank screen in both cases, but the disk & system sounds were consistent with a normal startup.
 
I pulled the card and restarted, and everything runs fine again with a single monitor running from the on-board connector (VGA).
 
I did not pre-install the included drivers, and of course while I had no video signal I could not do so. That is my next step, but I thought I would check here to see if anyone had any other thoughts. I'm doubting that the drivers alone will solve the problem, because even the on-board video failed to work when the card was installed. I don't mind upgrading the Power Supply if that is the problem, but I hate to bother if the card still won't work after I do so. And frankly, that would basically defeat the whole purpose of choosing the GT 720 in the first place. If I had the wattage, I probably would have bought a more powerful graphics card in the first place.
 
I would upload a photo, but with 500 kB max, I doubt it would be of much use.
 
Thanks in advance for any useful advice.
 
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Sure thing, glad the BIOS update fixed it..Also know that when a graphics card is detected in a PCIe/PCI slot, the onboard/iGPU graphics is auto-disabled unless manually set from Auto (the default setting) to iGPU/onboard..That setting is usually located in the BIOS -> Advanced -> System Agent Configuration -> Graphics Configuration -> Primary Display options (Auto/iGPU/PCIE/PCI), which is why you didn't get video from the mobo VGA connector (the GT 720 was still in the slot and the Primary Display was on Auto, giving preference to the GT 720)..When you removed the GT 720, it auto-switched back to using onboard/iGPU graphics..Leaving it on the default Auto setting is best.