Your 1090T is fully supported for that motherboard since it was released as the chip is older than your motherboard. The CPU list even says BIOS F2 is needed which is the first BIOS for that motherboard.
Tried an AM3 955 X4 BE CPU 10 minutes ago. Another fail. I'd rule out it being a CPU issue at this point.
It seems much more than a CPU issue anyway. It isn't even getting to the CPU test yet. It errors immediately which is the PCI lanes. Maybe remove all cards from pci/pcie slots and see if error is same? usually a CPU incompatibility is error 55. Usually an 88 error is an electrical short since it errors immediately or bad pci/pcie card/lanes.
I'll try that later today. Hungry & tired right now.
Try the jumper and pray it is just a locked-up BIOS.
I left the battery out & the jumper hooked up for almost 6 hours. Pulled the jumper, reinstalled the battery, installed the 955, hooked everything up again, & gave it a go. It now doesn't even do the continuous cycling. It just flashes the LCD real fast, gets the fans spinning, then powers completely off.
This is the first MB I can remember that doesn't have a 3 pin BIOS jumper set-up. I'm used to it being with a jumper always in place, on either pins 1&2, or 2&3, depending on if the BIOS is being used, or being reset.
If not, good luck with tech support. I've had good luck with Gigabyte tech support.
I'll start the process of dealing with them later today.