Broken hdmi port

Is this fixable? My older brother hasn't been able to play in a few months. So I decided I'll take the Xbox apart and take a look. The pins on the motherboard look okay to me. Also the led and power botton haven't been working, and the controller won't turn it on. I know the power supply isn't faulty because the fan powers on but it shuts off after two minutes of being on. I'm thinking the button and led aren't working because of a broken or loose ribbin cable.

Any help would be appreciated, but if eorst comes to worst, I might have to replace the HDMI port if it isn't fixible.