Has it been opened before you got it? Is the joy con working on that side? To replace the connector, it would need to go to someone who can micro solder. You may be able to get away with putting a piece of thin plastic, or paper in between the connector and flex cable to help make a better connection.
Have you tried this? (1) Make sure Gear is powered off. (2) Press and hold the power key until you see either the Galaxy Gear rebooting… . (3) Release the power key and then repeatedly press the power key until you see the Reboot Select Mode screen. (4) Press the power key to highlight the "recovery" option. (5) Long press the power key (5-8 sec.) to select it. The device will reset and return to the factory initialization screen."
Hello, I've repaired quite a bit of Pixel phones, and I usually get the screens from ifixit, witrigs, or on ebay. Unfortunately, it will be very hard to get an original display, unless it's used. Google doesn't sell parts (Trust me I've tried). I will say these screens are good quality, and look as good as the original. With ebay, you will have to be a little more selective, when finding a screen, but I've had successes with them in the past.
Ubreakifix is Samsung's authorized repair partner. However, I would recommend a reputable 3rd party option, which can be found by searching on Google. Here's a list of repair shops https://www.google.com/search?q=phone+re...-mobile&ie=UTF-8
I also can't find the rear glass. I called Google, and they mentioned there's a shortage. There are some at UBREAKIFIX, but they won't sell parts. I sure hope Google isn't going down the path of Apple.
I would try a hard reset (holding the power, and home button until apple logo appears). If that doesn't help, and assuming your iPhone is no longer under warranty, I would open it, and disconnect battery. I then would check the condition, looking for any bulging etc. I would also take a multi meter and check the battery voltage. Has the iPhone ever had any water damage?