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Not seeing anything on your screen can be due to many issues. The first issue can be that your backlight is to dim. In order to check this Press F6 to increase brightness and F5 to decrease brightness. If this doesn't do anything try charging your laptop or replacing the battery. Lastly, if none of this works try replacing the screen. Check out this repair guide to know how to do things: Lenovo Thinkpad x230 Screen Module Replacement
If you are having issues with you Ultranav first verify that it is enabled. To do this go to Device Manager, right-click on the properties under Ultranav driver, and then check the status of the device, if disabled, change to enable Ultranav. However, if your Ultranav is not installed check the following link to install it: http://support.lenovo.com/us/en/download.
The blue wires should be looped around the internal part of your Thinkpad. To know where it should connected try looking at this repair guide: Lenovo Thinkpad x230 Motherboard Replacement
