I have an older Gigabyte GA-990FXA-UD3 AM3+ motherboard. I recently replaced the CPU fan and noticed that the rear retaining bracket was held in place with two felt pads that rested on the rear of the motherboard attached with an adhesive. I used my fingers to rub off the excess adhesive and then reattached the bracket with new pads to this. Reassembled the motherboard, powered on, and all the fans and video card fans turn on fine, but no video. I've even tried it with different cards, ports and monitors. Also noticed that the LAN port doesn't illuminate. Is my board fried? Let me know if you can recommend something else.