Here are some quick fixes for a non-working phone speaker: (1) Check the volume: Make sure your phone isn't muted and the volume is turned up. (2) Restart your phone: A simple restart can often resolve software glitches. (3) Clean the speaker grille: Dust or debris can block the speaker. Use a soft brush to clean it gently. (4) Test with different audio sources: Try playing music, videos, or making a call to see if the issue persists across all apps. If these don't work, the problem might be more serious and require professional repair.

Replacing the speakers on an HP ProBook 450 is definitely an option if you've exhausted software troubleshooting. Here's how to get you started: Before you begin: (1) Back up your data! (2) Turn off your laptop and unplug it from the power outlet. Finding a guide: There are resources available online that can guide you through the replacement process specific to your HP ProBook 450 model. Here is a option: (1) iFixit: iFixit offers a repair guide for the HP ProBook 450 G4 speaker replacement. While the exact steps might vary slightly depending on your model, it should give you a good overall idea of the process. here is the link - HP ProBook 450 G4 Speaker Replacement

No, you cannot install an iPhone 8 battery in an iPhone 8 Plus. Even though the battery capacity of the iPhone 8 (1821 mAh) is lower than the iPhone 8 Plus (2691 mAh), the batteries are physically different sizes and won't fit in each other's phones.