Question 1

when i switch to game mode on my ps5, the screen gets noticeably darker and washed out.

Accepted Answer

DIAGNOSIS That's Game Mode doing its job—it turns off a lot of picture processing to reduce lag, which includes disabling some dynamic contrast and local dimming features. On the QN85C, this can make the image look flatter and dimmer by default. FIX You need to recalibrate the picture while in Game Mode. With your PS5 on and Game Mode active, go to Settings > Picture. First, make sure your PS5 is set to output in "Game" picture mode (it should auto-switch). Then, adjust these: Turn "Contrast Enhancer" to High or Medium. Bump up the "Shadow Detail" a notch or two. Most importantly, go to Expert Settings and set "Local Dimming" to High. This restores a lot of the pop without adding significant input lag. IF THAT DIDN'T WORK Check your HDMI input settings. On the TV, go to Connection > External Device Manager > HDMI Settings and make sure "Input Signal Plus" is ON for that specific HDMI port. This enables the full bandwidth for HDR and VRR. Also, on your PS5, check the HDR calibration in system settings to make sure it's not set too low. HEADS UP Game Mode picture settings are separate from other modes. Tune it once while playing a game you know well, and those settings will stick for that HDMI input. Don't use the "Dynamic" or "Standard" picture mode in Game Mode—they'll still look off. Stick with "Game" or "Movie" as your base.

Question 2

the tv turns on by itself in the middle of the night. it's creepy and wasting energy.

Accepted Answer

DIAGNOSIS That's spooky, but it's almost always a feature, not a ghost. The main culprits are HDMI-CEC (Anynet+) where a connected device wakes it, the internal "Auto Power On" schedule, or a faulty wake-from-LAN setting. FIX Go to Settings > All Settings > General & Privacy. Turn OFF "Power On Via Mobile" and "Power On With WiFi." Next, go to Connection > External Device Manager > HDMI Settings and turn OFF "Input Signal Plus" for each HDMI port temporarily as a test. Also, disable "Auto Power On" in the same External Device Manager menu. See if the phantom boots stop. IF THAT DIDN'T WORK Check your timers. Go to Settings > All Settings > General & Privacy > System Manager > Time > Sleep Timer & Auto Off. Make sure no sleep timer is active and that "Auto Off" is set to "Off." Also, in the same System Manager menu, go to "Power and Energy Saving" and disable "Ambient Mode Detection" if it's on. HEADS UP If you have a cable box, game console, or soundbar connected via HDMI, their CEC signals can be flaky. Try unplugging all HDMI devices one night to isolate the culprit. If the TV still turns on with everything unplugged and all settings off, a full factory reset (Settings > Support > Self Diagnosis > Reset) is the last step before a service call.

Question 3

how do you clean the screen on this thing without messing up the coating? it's a dust magnet.

Accepted Answer

DIAGNOSIS You're right to be careful. The QN85C screen has a strong anti-glare coating that can be damaged by chemicals or abrasive pressure. Static makes it attract dust like crazy. FIX The only tools you need are a clean, dry, ultra-soft microfiber cloth (like for glasses) and maybe distilled water. First, unplug the TV to reduce static. Gently wipe the screen in a single direction with light pressure to lift dust. For smudges, slightly dampen a second microfiber cloth with only distilled water—never spray directly on the screen. Wipe gently, then immediately dry-buff with the dry cloth. IF THAT DIDN'T WORK For stubborn spots, don't press harder. Instead, breathe lightly on the spot to create a slight fog, then immediately wipe with the dry microfiber. The tiny bit of moisture is usually enough. HEADS UP Never use window cleaner, alcohol, ammonia, or any all-purpose spray. They will permanently haze or strip the anti-reflective coating. Also, avoid those "cleaning kits" with liquids. If you've already used a chemical and see a cloudy residue, it's likely damaged and won't buff out—you'll have to live with it.

Question 4

my samsung tv remote (the solar one) is super laggy or not working unless i'm right next to the tv.

Accepted Answer

DIAGNOSIS The solar cell remote uses Bluetooth, not infrared. Lag or short range is almost always due to interference or a weak battery that isn't getting enough light to charge properly. FIX First, recharge it. Leave it under a bright room light or near a window (indirect sun is fine) for at least 4-6 hours. The red light on the front should come on. Then, re-pair it. On the TV, go to Settings > All Settings > General & Privacy > Power and Energy Saving > Remote Control Battery Saver. Turn it OFF. Then, press and hold the Back and Play/Pause buttons together for about 5 seconds until it re-pairs. IF THAT DIDN'T WORK Check for interference. Other Bluetooth devices (soundbars, headphones, speakers) nearby can clog the signal. Turn them off one by one to test. Also, make sure the One Connect box isn't buried behind metal, which can block the signal. HEADS UP If the remote is constantly dying, the solar/battery unit might be defective. You can try a factory reset on the remote (press and hold the power button for 10 seconds while pointing it at the TV). If it's still bad, Samsung will often send a replacement under warranty for this known issue.

Question 5

the motion smoothing on my qn85c is awful and makes everything look weird, how do i kill it for good?

Accepted Answer

DIAGNOSIS You're fighting the default "Auto" Motion Plus settings. They're overly aggressive out of the box, creating the "soap opera effect." The settings can also behave differently per input and app, which is frustrating. FIX Press the home button, go to Settings > All Settings > Picture > Expert Settings. Find "Picture Clarity Settings." Here, set "Judder Reduction" and "Blur Reduction" to 0. The best move is to change the "Film Mode" to "Auto" or "On." For a blanket fix, go back to the main Picture menu, select the mode you use (like "Movie"), and turn "Auto Motion Plus" to "Off." Do this for each input (HDMI 1, Netflix app, etc.). IF THAT DIDN'T WORK Some content, especially from built-in apps, might override your settings. Try enabling "Game Mode" for that input—it disables all processing, including motion smoothing. You can also try the "Film Maker Mode" from the quick settings menu, which is designed to turn off all post-processing. HEADS UP Remember, these settings are saved per picture mode per input. If you switch from "Movie" to "Standard" mode, the motion settings will reset to aggressive defaults. Pick a mode you like, dial it in, and stick with it.

Question 6

why does my samsung qled keep disconnecting from wifi every few hours? have to reboot to get it back.

Accepted Answer

DIAGNOSIS This is a common gripe with many Samsung smart TVs, including the QN85C. It's often a software handshake issue between the TV's network chip and your router, especially on congested 2.4GHz bands. FIX First, forget your Wi-Fi network on the TV and re-enter the password. If that's temporary, dive into the network settings. Turn OFF the "Auto" for IP settings and manually set a static IP address for your TV in the same range as your router. This often stops the drops. Also, in your router settings, try assigning a reserved IP (DHCP reservation) for the TV's MAC address. IF THAT DIDN'T WORK The nuclear option is to reset the Smart Hub. Go to Settings > Support > Device Care > Self Diagnosis > Reset Smart Hub. This clears all app data and network settings without a full factory reset. You'll have to log back into everything. HEADS UP If you have a dual-band router, force the TV onto the 5GHz network if possible—it's usually less congested. If the problem persists, a cheap Ethernet-to-USB adapter plugged into the One Connect box for a wired connection is the most reliable fix.

Question 7

just got my qn85c mounted and the one connect box is getting super hot to the touch, is that normal?

Accepted Answer

DIAGNOSIS It's normal for the One Connect box to get warm, but "super hot"—where you can't keep your hand on it—often means it's starved for air. Mounting it flat against drywall or stuffing it in a media cabinet is the usual culprit. FIX You need to give it at least an inch of clear space on all sides, especially the top and bottom. If it's mounted behind the TV, use the included spacer or get some velcro strips to create an air gap. Make sure the vents aren't blocked by cables. Feel it again after 30 minutes of watching; it should be warm, not scorching. IF THAT DIDN'T WORK Check what's plugged in. High-power USB devices (like external hard drives) or an overpowered soundbar via HDMI can draw more current and heat it up. Try unplugging non-essential peripherals to see if the temperature drops. HEADS UP Chronic overheating can lead to premature failure or the TV randomly shutting off to protect itself. If it's still too hot with good airflow and nothing extra plugged in, contact Samsung. There's a small chance the unit's power regulation is faulty.

Question 8

my new samsung qn85c is showing a weird grid of colored lines or blocks on the screen, it's not the source.

Accepted Answer

DIAGNOSIS That's usually a sign the main board isn't communicating cleanly with the panel, often from a loose connection that got jostled in shipping or setup. FIX Unplug the TV from the wall. Grab a clean, dry microfiber cloth. Gently but firmly press along the entire back edge of the TV, especially the center and bottom where the main cables route into the panel. You're reseating the internal ribbon cables. Plug it back in and power up. If the lines are gone, you're good. IF THAT DIDN'T WORK Try a panel self-test. With the TV off, press and hold the power button on the TV itself (not the remote) for about 10-15 seconds until you see the Samsung logo. It'll run a diagnostic. If the lines appear during this test, it's a hardware fault needing service. HEADS UP Don't open the TV yourself to check connections on the QN85C. The panel is extremely fragile and you'll void the warranty. If the press test and self-test don't clear it, it's a call to Samsung support time.

Samsung 65 inch QN65QN85C Neo QLED 4K Smart TV

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