I share the CIC Guide for webOS3.5 UJ63/UJ65/67/70 models.
There is broken image or no signal issue when you insert the external CAM.
please refer to the bellow troubleshooting
Step1. Please note that, Quick start + Shoud be set off it before SW update. settings → general → turn off the 'Quick Start+'
Step2. Visti www.lg.com → search your model name → Please find SW 3.50.45 and update your TV by USB storage
(※ Refer to the exiting video guide for SW update mathod by USB Storage)
If the customer don't know about 'Step2. USB update', Please let them know
latest SW 3.50.45 version will be released after 5th APL.