To resolve the issue with Bingo Golden not responding after installation and displaying a screen with "start, log in & sign up," you can follow these systematic steps:

1. Check Internet Connection: Ensure that your iPhone is connected to a stable internet network, either Wi-Fi or cellular data. The app may require a proper connection to function correctly.

2. Force Close the App: Double-tap the Home button (or swipe up from the bottom of the screen if your iPhone has no Home button) to access the app switcher. Swipe up on the Bingo Golden app to force close it. Then, reopen the app to see if it responds.

3. Restart Your Device: Hold down the power button and slide to power off your iPhone. Wait for about 30 seconds, and then turn it back on. This can refresh the system and may help the app to respond.

4. Clear App Data: Go to your Settings > General > iPhone Storage. Find Bingo Golden in the list of apps. Tap on it, and choose "Offload App." This will free up some storage used by the app while keeping its documents and data intact. Once offloaded, reinstall the app.

5. Reinstall the App: If the previous step does not work, you can delete the app completely. To do this, go back to Settings > General > iPhone Storage, find Bingo Golden, and select "Delete App." Then, head to the App Store and download the app again.

6. Check for App Updates: Ensure that you have the latest version of Bingo Golden by checking for updates in the App Store. Updates often contain bug fixes for issues similar to what you are experiencing.

7. Software Update: Check if your iPhone has the latest iOS version installed. Go to Settings > General > Software Update and install any pending updates. Some apps may not function well on outdated software.

8. Contact Support: If none of the steps resolve the issue, reaching out to Bingo Golden's support team may yield more specific solutions. You can usually find contact information within the app or on their official website.

By following these steps methodically, you should be able to troubleshoot the issue effectively. If problems persist, community forums like Reddit or Facebook may provide additional insights and experiences from other users facing the same situation - learn more - learn more - learn more.