Hi @ryanarkell ,
Just verifying that you found and removed the lost screw before reconnecting the battery to the motherboard?
Since you say that you can uninstall the USB devices, this means that they’re showing up OK in Device Manager i.e. shown as this “device is working properly” in Device Manager > Universal Serial Bus Controllers > USB Root Hub > right click on Properties > General Tab > Device Status box, (check all Root Hubs), is this correct?
If not, then there may be a problem with the USB controllers on the motherboard.
If so, plug in a USB mouse or mobile phone and check if there is power coming from the USB ports i.e mouse laser lens light turns on or the phone starts to charge.
If there is no power present then, first check that the power to the USB ports has not been turned off. Go to Device Manager > Universal Serial Bus Controllers > USB Root Hub > right click on Properties > Power Management tab > uncheck “Allow the computer to turn off this device to save power” > OK. (check all Root Hubs), You may have to restart the laptop for the change to come into effect, not 100% sure whether you have to or not.
If it was already unchecked then here’s the maintenance and service guide for the laptop, taken from this webpage.
Go to p.51 to view the necessary pre-requisite steps and then the procedure to remove the USB board.
This shows where the ribbon cable from the USB board connects into the motherboard. Check that it is securely connected at both ends.
If they're all appearing OK in Device Manager it's starting to look like a hardware problem with the USB connectors or their connection to the motherboard.
Time to open the laptop and take a look at the ribbon cable. It could still be a problem with the +5V USB power supply on the motherboard, but one step at a time.
Having the battery disconnected before should have prevented any electrical problems from occurring during what you were doing, so I'm thinking it's looking like something "mechanical".