Dennis' 2011 iMac is showing lines on a white screen. Leo says it could be a failed monitor, or even the cable that connects to your monitor has failed. The OS may have been corrupted as well. Try booting into recovery mode. CMD+R. That will bypass the loading of the OS and will allow you to reinstall the OS. You can also try target display mode. If the problem persists, the Mac needs replacing., because it'll cost too much to fix.
Stan is having issues with his home theater system subwoofer. No bass at all. Leo says that there are two ways to connect your subwoofer. A single RCA jack or an LFE connection (for low frequency).
But it could also be a setting in Netflix. Make sure you have your Netflix app set for surround. Make sure the highest quality is also selected. Also, check the settings in your streaming box.
Jeff has a ViewSonic LED monitor, but recently the monitor has started hesitating waking up. It also flickers. Is that a computer or a monitor issue? Leo says it isn't unusual as a monitor that's HDMI driven goes through a "handshake" to determine the best resolution to display. But if it's a standard DVI or VGA connection, then the flickering could be caused by a bad cable or even power interference with the cable. Worst case, the monitor may be starting to fail. But that's unlikely. Start with the easy solution first and replace the cable. It could also be an issue with your video card.
Richard's old 2008 Mac will knock other devices off the network when he downloads something with it. Leo says to make sure each device has its own IP address.
While on Zoom, Karen has an issue where her image freezes while her audio stays the same. Leo says a slow internet connection can cause that. She had Spectrum come out and replaced the modem and router, and that's when it started. Leo adds that it could also be an issue with her webcam. Check using Facetime. If it freezes there, then it's not Zoom, it's a wider video issue.
Don was using SpinRite on his computer and he's having a problem running it without a thumb drive. Leo says Windows may be getting in the way and he recommends trying a USB key that boots to FreeDos and add SpinRite onto that. You'll boot to it and then run SpinRite from there. Then you can run SpinRite on your hard drive.
Bruce is having issues with audio sync on his TV and home theater/DVD player. Leo says that sync is often built-in and should be in the settings for the device. Bruce gave up on his FireStick. Leo says that a lot of people have. There are some tricks like turning off encoding (or on). Look at the TV settings as well. Maybe a better HDMI cable would help.
From the chatroom - check the manual for AV Sync. https://www.sony.com/electronics/support/articles/00012347
Brant is having an intermittent problem with his USB ports not working. He has to reboot to get them working again. Leo says it could be hardware or software. Hardware-wise, the solders could be coming off and the computer has to warm up to reseat the solder connections. The easy fix is to get a USB card to add to your system and bypass the onboard connections altogether. It could also be your computer is underpowered or your power supply is getting flakey. Try unplugging your USB items and reboot. If could also be a bad USB driver. You can try removing them and then rebooting.
Jim uses Chromebooks, has three of them. But on his newest one, he keeps getting a notice to add Gmail to his Google Account, even though he already has one. Leo suggests that it may be time to "powerwash" it. Make sure all your local data is stored in the cloud and then select powerwash in the settings and relog in. You should never get that message again.
Marcy is having trouble with her HP Office Jet Color printer. It won't print in color anymore. Her test page will. But nothing else. Leo says it could be a driver issue. He recommends updating your printer drivers. In this thread, it says that if you install a different driver, it'll fix the problem.