ONN TV problems range from power failures and black screens to Wi-Fi drops and frozen apps. Walmart’s budget TV line runs Roku OS on most current models, though newer 2025 sets ship with Google TV. I’ve troubleshot dozens of ONN sets over the past two years, and the fixes below cover every major issue I’ve encountered.
- Power cycling fixes roughly 80% of ONN TV glitches. Unplug for 60 seconds and hold the power button for 30 seconds before reconnecting.
- The pinhole reset button sits on the back panel. Press it with a paperclip for 15 seconds to force a factory reset when menus won’t load.
- Dead remote batteries cause the most support calls. Swap in fresh AAA cells and clean the IR window before replacing the remote.
- CEC triggers unwanted reboots on ONN sets — disable it under Settings > System > Control Other Devices to stop HDMI peripherals from cycling power
- Wi-Fi drops usually stem from band congestion — switching from 2.4 GHz to 5 GHz or moving the router within 15 feet of the TV stabilizes the connection
#What Are the Most Common ONN TV Problems?
ONN TVs sold at Walmart since 2020 share a common set of failure patterns. After reviewing repair logs and community forums, these ten issues appear most often:
- TV won’t turn on
- Black screen with sound
- Random reboots or restart loops
- Remote control not responding
- Wi-Fi disconnects or won’t connect
- Sound cuts out or no audio
- Screen flickering or color distortion
- Stuck on the Roku logo
- Apps crashing or buffering
- TV shuts off by itself
Most of these trace back to three root causes: a software glitch that a reboot clears, a loose cable connection, or a failing hardware component. The troubleshooting sections below tackle each one.
#Fixing an ONN TV That Won’t Turn On
An ONN TV that won’t power on is the single most reported problem. Start with the power source and work inward.
Confirm the outlet works by plugging in a lamp or phone charger. Inspect the power cord for fraying or bent prongs. On a 2024 ONN 50-inch Roku TV I tested, a slightly loose barrel connector on the back panel was the entire problem.
According to Roku’s support documentation, loose power connections account for a significant share of “won’t turn on” cases.
If the outlet and cord check out, do a forced discharge. Unplug the TV, then press and hold the power button on the TV itself (not the remote) for 30 seconds. Wait another 60 seconds, plug it back in, and try powering on. This clears residual charge from the capacitors and resets the power management circuit.
Still dead? Check whether the red standby light is blinking. A blinking pattern often points to a specific hardware fault like a failed backlight driver or blown capacitor. No light at all usually means the power supply board has failed, which requires professional repair.
#Why Does Your ONN TV Keep Rebooting?
An ONN TV caught in a restart loop or turning off repeatedly almost always has a CEC conflict or overheating issue.
Start by unplugging every HDMI device. If the reboots stop, reconnect them one at a time to find the culprit. Game consoles and soundbars with CEC enabled are the most common triggers.
Turn CEC off under Settings > System > Control Other Devices.
Overheating is the other likely cause. ONN TVs lack active cooling fans, and placing them inside enclosed cabinets restricts airflow. If the TV feels hot to the touch along the top edge, move it to an open surface or add a small USB fan behind it. The TV displays an overheating warning message when internal temps exceed safe limits.
If reboots persist after fixing CEC and ventilation, perform a factory reset. Locate the reset button on the back panel and press it with a paperclip for 15 seconds. The TV will wipe all settings and reinstall the OS from its recovery partition.
#Fixing ONN TV Display Problems
Display issues on ONN TVs fall into three categories: total black screen, flickering, and color distortion.
Black screen with sound. Your TV is on but the backlight or T-CON board isn’t driving the panel. Shine a flashlight at the screen. If you see a faint image, the backlights have failed and need replacement. For software-related black screens, see the ONN TV black screen guide.
Screen flickering. Loose HDMI cables cause most ONN TV flickering issues. Reseat every cable, then try a different port. On my test unit, switching from HDMI 1 to HDMI 3 eliminated the flicker entirely.
Color distortion or washed-out picture. Go to Settings > TV Picture Settings and reset to Standard mode. Vivid mode on ONN TVs pushes color saturation beyond accurate levels. Also confirm the connected device outputs a resolution the TV supports. A 4K signal sent to a 1080p ONN set produces garbled colors.
#Troubleshooting ONN TV Sound Issues
No audio? Press the mute button and raise volume past 20. After streaming on a 2024 ONN 43-inch for six months, I noticed Roku OS occasionally resets the audio output mode after firmware updates.
Check Settings > Audio > Audio Mode and set it to Stereo or PCM. Auto-detect sometimes selects a surround format the TV’s internal speakers can’t decode, producing silence. If you use a soundbar via HDMI ARC, confirm the TV’s HDMI ARC port matches where the soundbar connects.
For detailed fixes including optical audio troubleshooting, read the full ONN TV no sound guide.
A factory reset clears corrupted audio settings if nothing else works. Based on Roku’s release notes, audio output bugs appear in roughly one out of every four firmware updates, so checking the Roku support page helps determine if your issue has a pending fix.
#Fixing ONN TV Remote Control Problems
The ONN TV remote not working is usually a battery or pairing issue, not a broken remote.
Swap both AAA batteries first. Even weak batteries can make the remote LED flash without producing enough IR signal to reach the TV sensor across the room. Wipe the IR transmitter on the remote’s front edge with a dry cloth while you have it open.
Re-pairing takes under a minute. Remove the batteries, unplug the TV for 30 seconds, plug it back in, wait for the home screen, then reinsert fresh batteries.
If the physical remote is truly dead, download the Roku mobile app on your phone. It works as a full replacement remote over Wi-Fi and includes voice search and a keyboard for text entry. A replacement ONN remote costs $10-$15 on Walmart.com.
#Fixing Wi-Fi Connection Problems on ONN TVs
Your ONN TV won’t connect to Wi-Fi for one of three reasons: wrong password, band interference, or a firmware bug.
Start by forgetting the saved network. Go to Settings > Network > Wireless and select your network, then choose Forget. Reconnect from scratch and type the password carefully. ONN TVs don’t show password characters, so one wrong letter fails silently.
Band selection matters too. Use 5 GHz if the router is within 20 feet; use 2.4 GHz if walls block the signal.
If your router broadcasts both bands on the same SSID, the TV may jump between them unpredictably. Set your router to broadcast separate SSIDs for each band and connect the TV to 5 GHz if it’s within range.
Wired Ethernet is the most reliable fix for persistent drops. ONN Roku TVs have an Ethernet port on the back panel, and a direct cable connection eliminates Wi-Fi variables entirely. Expect streaming buffer times to improve by 40-60% compared to a congested wireless link in a typical apartment with multiple competing devices and thick walls between the router and TV.
Check for firmware updates under Settings > System > System Update. According to Roku’s changelog history, Wi-Fi stability patches appear in roughly half of all ONN TV firmware releases, which ship every 6-8 weeks.
#Fixing App Crashes and Streaming Issues
Netflix not working on ONN TV and other app crashes usually mean the app’s cache is corrupted or the TV’s memory is full.
Reinstall from the Roku Channel Store.
For Netflix specifically, go to Settings > Apps > Netflix > Clear Cache to wipe stored data without a full reinstall. Multiple apps crashing usually means full storage, since ONN Roku TVs have only 8 GB total with roughly 4 GB free after the OS takes its share, so deleting unused channels from the home screen is the fastest way to reclaim space and stop the crashes.
Buffering points to bandwidth, not the TV. According to Netflix, 4K streaming needs 15 Mbps. Test yours at Settings > Network > Check Connection.
#When DIY Fixes Don’t Work
If you’ve power cycled, factory reset, and tested cables without any improvement, the problem is hardware. The three most common component failures in ONN TVs are dead LED backlight strips that cause black screens, blown capacitors on the power board that prevent startup, and failed T-CON boards that distort colors or produce garbled images on the panel.
Parts are inexpensive. LED strip kits run $25-$40, and capacitor kits cost under $10. YouTube has model-specific teardown videos for most ONN sizes.
ONN TVs carry a one-year Walmart warranty. If your TV is under warranty, contact Walmart’s electronics department with your receipt for a replacement. After warranty, a local TV repair shop can assess whether the fix costs less than a new set.
#Bottom Line
Start every ONN TV troubleshooting session with a power cycle: unplug for 60 seconds, hold the power button for 30 seconds, reconnect. That one step resolves most software-related problems. For persistent issues, the pinhole factory reset wipes corrupted settings back to a clean state.
Hardware failures like dead backlights or blown capacitors need replacement parts, but the components are inexpensive and well-documented for DIY repair. Check your Walmart warranty status before spending money on repairs.
#Frequently Asked Questions
#How do I power cycle my ONN TV correctly?
Unplug the TV from the wall. Hold the power button on the TV itself for 30 seconds, wait 60 seconds, then plug back in. This drains residual capacitor charge and resets the power management system completely, clearing any software glitch that caused the TV to freeze, display a black screen, or refuse to respond to the remote control.
#Why does my ONN TV screen go black but I can still hear audio?
The LED backlight array has likely failed. Shine a flashlight at the screen. If you see a faint image, the panel works but the backlights don’t. This requires replacing the LED strip kit inside the TV, which costs $25-$40 for parts.
#Can I use my phone as an ONN TV remote?
Yes. Download the free Roku mobile app on iOS or Android and connect your phone to the same Wi-Fi network as the TV. The app works as a full remote with voice search.
#How often does Roku push firmware updates to ONN TVs?
Roughly every 6-8 weeks. Go to Settings > System > System Update > Check Now to see if one is available. Updates install overnight if the TV stays plugged in and connected to Wi-Fi. Roku doesn’t publish a fixed schedule, so checking manually after experiencing any bug is worth the 10 seconds it takes.
#Does ONN offer in-home repair service?
No. ONN is a Walmart house brand and doesn’t provide in-home technician visits. Your options are the one-year Walmart warranty (replacement, not repair), a local TV repair shop, or DIY component replacement using online parts and tutorial videos.
#What should I do if my ONN TV overheats?
Move the TV out of any enclosed cabinet or tight shelf space. Make sure at least 4 inches of clearance exists on all sides and above the TV. Clean dust from the ventilation slots along the back panel with compressed air. If overheating persists, a small USB-powered fan placed behind the TV provides additional airflow.
#Is it worth repairing an ONN TV or should I buy a new one?
It depends on the repair cost versus the TV’s value. LED backlight replacements ($25-$40) and capacitor fixes (under $10) make sense financially. If the main board or T-CON board fails, parts run $50-$80, which approaches the cost of a new 43-inch ONN at $148. For older 32-inch sets, replacement is more practical.