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ATI Radeon 5550 (gfx card) works, but 3200-series (onboard) doesn't
Gateway DX4300 with ATI Radeon 5550 (gfx card)
3200-series (onboard) -
Display Driver (device mgr): AMD Radeon HD 5500 Series and ATI Radeon HD 3200 Graphics (working properly)
2 Gateway HX2000: 1 DVI-D, 1 VGA - both detected and named properly
Third monitor: Dell 1905FP VGA only - not currently detected (but it's the onboard, not the monitor, see below)
AMD CCC version 2015.0728.2244.39078
8.00 GB RAM (7.75 GB usable)
* Installed Win10 Home x64 over Win8.1 (which was over 8, which was over 7, x64 Home Prem versions). Three monitors worked, just as they had in 7, 8, and 8.1, until restart with WinUpdate forced update, then onboard stopped working. Doesn't matter which VGA is plugged into it, no joy.
* Clean install of Win7 (only disk I had because 8 & 8.1 were downloaded upgrades). Onboard didn't work at all after this, not even initially.
* Backed all files up and clean installed Win10. Again, all three monitors worked initially, until machine restart.
When the Dell VGA is found, and when it was part of the three monitor setup that was working initially before the restart, Win10 detects it, names it properly, and it works, presumably, off the ATI Radeon HD 3200 Graphics display adapter. However, when it's connected (or when the VGA Gateway HX2000 is connected) to the onboard, after that initial working period before restart, the one on the onboard is not detected at all.
This led me to conclude it's the onboard, not any of the monitors, which all worked in tandem with extended desktop through 7, 8, and 8.1. It's only with the newer software for the AMD/ATI (which had not been upgraded since they first offered 8.1 for free) has "broken" my onboard.
However, if I pull the card, restart, the onboard works fine, and detected (and properly names under Monitors) whichever VGA I connect. So they aren't working together, at least after that initial period.
I've spent nearly 5 days working on this, Googling answers, and trying different stuff. I'll even take a simple fix that makes me feel stupid at this point, if only I could have all three working again.
The only alternative I'm left with at this point is to run the third off a USB converter, but that's not the most ideal way to go, IMO, and will restrict how well the third monitor works.
TIA for the long read. :)