Same problem here and we tried all the fixes and nothing. While trying all this someone moved the fire stick remote and the TV instantly reacted(turned off and on). We thought this to be strange. So we covered up the ir on the fire stick remote and low and behold the TV stayed on. We unblocked the ir signal and the TV started turning off and on again. Removed the batteries from the fire stick remote and the TV stayed on. After we were sure this was the cause we put the batteries back in and everything worked fine. What I gather is the fire stick remote was cycling on and off thereby turning the TV on and off. After removing the batteries it somehow stopped the cycling and reset the remote TV is working fine now. If this is happening to you maybe you want to remove other remotes from the area and see if they may be the problem. Answer from Dan Flamini on ifixit.com
JustAnswer
justanswer.com › tv-repair › fqmhc-vizio-smart-tv-model-d40f-g9-won-t-turn.html
Troubleshooting Vizio D40f-G9 TV: Won't Turn On and Other Common Issues
D40f-G9 often shows faint power light and fails to fully power on or randomly shuts off. A fading power light on the Vizio D40f-G9 usually indicates a failing power supply board or capacitor issues.
Dell
dell.com › dell community › enterprise products & services › isg event calendar › enterprise event calendar
Vizio d40f G9 | DELL Technologies
April 5, 2024 - Has anybody ever owned one of the Vizio TVs and issue with them consistently freezing with a major lag rate of audio when it came to the optics output and last but not least have you ever been able...
Videos
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Vizio TV Won't Turn On But Power Light Fades Off? QUICK Fixes! ...
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VIZIO Support | Troubleshooting SmartCast Not Working - YouTube
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Vizio TV Black Screen Fix - Try This! - YouTube
01:42
How To Fix a Vizio TV that Won’t Turn On - YouTube
Black Screen (Model D40f-G9)
Hello there! Please press and hold the Input and Volume + buttons on the TV itself and not the remote for 60 seconds while the TV is powered on. This might get a picture back on the screen. If this doesn't work please give us a call at 877-878-4946 so that we can troubleshoot this with you. Thanks! More on reddit.com
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March 2, 2021Issues with D40f-G9 firmware update
If you are having an issue with your Vizio product, please reach out directly by visiting https://vizio.tv/contact. ... I just updated a D40f-G9 from v. 3.22.15 to v. 4.500.11.1-9. The new firmware is very different. Response time is much slower, and I find that it's more difficult to get to ... More on reddit.com
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March 24, 2023Vizio TV Firmware wont update
I found a fix for my tv with a similar problem. Steps to fix are as follows: (1) download and install 4.25.11, (2) download and install 4.60.27-1 and finally (3) update to latest firmware. Steps (1) and (2) will require updating using USB drive. More on reddit.com
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January 31, 2022D40f-G9 won't update.
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August 27, 2020Vizio Support
support.vizio.com › s › article › How-to-fix-display-issues
VIZIO Support
The VIZIO Support homepage provides the latest trending support topics and support videos, user manuals, product registration, along with tech specs and troubleshooting steps.
Reddit
reddit.com › r/vizio_official › black screen (model d40f-g9)
r/VIZIO_Official on Reddit: Black Screen (Model D40f-G9)
March 2, 2021 -
(Problem Fixed, Solution in replies)
Bought this Vizio TV last Christmas for a family member just to find out that it didn't leave the box. I took it back and unboxed it fairly quickly.
Here's where the problems lie, after booting it up and going through the setup process my TV said that it would reboot shortly. OK. I went to eat for 20 minutes before coming back to a blank screen (Turned on of course).
I looked up a few troubleshooting guides but nothing helped (not even holding the Volume - and Input buttons for 10 seconds, though it did pill up a visible prompt). I'm quite annoyed by this and this Vizio will most likely be my last as even my Sylvania TV from 8~10 years ago still works just fine.
Can anybody give me any tips to fix this flimsy thing, I have the D40f-G9 model?
Consumer Reports
consumerreports.org › electronics & computers › audio & video › tvs › vizio d40f-g9
Vizio D40F-G9 TV Review - Consumer Reports
October 16, 2018 - When viewing the image from above or below eye level to the screen, the vertical viewing angle was good. The picture showed some change in color, contrast, and black level. MOTION BLUR. This Vizio TV has good motion performance, with some blurring ...
HardReset.info
hardreset.info › devices › vizio › vizio-d40f-g9
Hard Reset VIZIO D40f-G9
If you want to restore default settings on VIZIO D40f-G9 you should follow our guide and perform the hard reset operation. As a result, you will delete all personal info, customized settings and installed apps on your VIZIO D40f-G9. Check out how to hard reset VIZIO D40f-G9 and wipe all personal ...
Vizio Support
support.vizio.com › s › article › Troubleshooting-your-Wireless-Network-Connection-on-VIA-and-VIA-TV-s
Article Detail
The VIZIO Support homepage provides the latest trending support topics and support videos, user manuals, product registration, along with tech specs and troubleshooting steps.
Vizio
vizio.com › en › tv › d-series › d40f-g9
VIZIO D-Series™ 40” Class (39.5" Diag.) Smart TV | D40f-G9
D40f-G9 · vizio/components/structure/product-detail-page · We’re sorry, the requested quantity is not available. Notify Me · Thank you for signing up! You’ll receive an email once this product is available. Overview · Tech Specs · Support · Brilliant Picture Quality ·
Vizio Support
support.vizio.com › s › article › D40f-G9-Model-Information-EXT
D40f-G9 Model Information
The VIZIO Support homepage provides the latest trending support topics and support videos, user manuals, product registration, along with tech specs and troubleshooting steps.
Top answer 1 of 9
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Same problem here and we tried all the fixes and nothing. While trying all this someone moved the fire stick remote and the TV instantly reacted(turned off and on). We thought this to be strange. So we covered up the ir on the fire stick remote and low and behold the TV stayed on. We unblocked the ir signal and the TV started turning off and on again. Removed the batteries from the fire stick remote and the TV stayed on. After we were sure this was the cause we put the batteries back in and everything worked fine. What I gather is the fire stick remote was cycling on and off thereby turning the TV on and off. After removing the batteries it somehow stopped the cycling and reset the remote TV is working fine now. If this is happening to you maybe you want to remove other remotes from the area and see if they may be the problem.
2 of 9
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@achenevert · you do want to go ahead and check the power board. This could be a bad capacitor issue as well as a backlight issue. Measure the voltages going to your backlight etc. Also, since you are having a hard time with the remote control etc. consider replacing the remote with one that works for your TV. When your TV turns itself off, shine a flashlight at an angle against your screen. see if you can make out shapes and silhouttes etc. Let us know what you find.
Vizio
cdn.vizio.com › user-manual › PDF › 2019 › TV › UM › D24h-G9_D40f-G9_D50x-G9_V505-G9_UM-ENG.pdf pdf
User Manual Models: D24h-G9, D32h-G9, D40f-G9, D50x- ...
June 11, 2018 - VIZIO is more than America's #1 LCD HDTV. Explore our full line of home electronics - LED HDTVs, tablets, stream players, PCs, home audio, and more.
SoundPEATS
manua.ls › home › televisions › vizio › d40f-g9
User manual VIZIO D40F-G9 (English - 55 pages)
USER MANUAL Models: D24h-G9, D32h-G9, D40f-G9, D50x-G9, V405-G9, V505-G9 & V655-G9 ... Binding Arbitration Agreement; Class Action Waiver (U.S. Residents Only) ... Why won't my smart cast work on my TV or the watch free feature. It used to I don't know why it won't now. I've tried the tips from the internet the reset option nothing has worked and I've only had it for not even a year ... The SmartCast feature on your VIZIO D40F-G9 television allows you to easily discover, stream, and control your content.
Amazon
amazon.com › Television-Repair-D40F-G9-Supply-Cables › dp › B0BYTRQM9X
Amazon.com: Lutema Television Repair Kit for Vizio D40F-G9 with TV Main Board + Power Supply + TCon + Cables : Electronics
Television repair kit for Vizio D40F-G9. Our TV Repair Kits usually include all the major components that make up the internal composition of the Television. The objective of these repair kits are to enable anyone with basic knowledge of electronics to be able to repair their television.
JustAnswer
justanswer.com › tv-repair › eqbmf-model-d40f-g9-working-great-sudden-can-t.html
Vizio D40f-G9 Problems & Solutions | Expert Q&A
If the D40f-G9 won’t turn on and shows no lights, first check the power cord and outlet. A tiny flashing light indicates standby mode or power supply issues. Try unplugging the device for several minutes to reset internal capacitors.
AVS Forum
avsforum.com › home › forums › display devices › lcd flat panel displays
Vizio - Black Screen of Death | AVS Forum
August 30, 2022 - As I said, Vizio's aren't known for their longevity. Had one for my bedroom TV and it only got very occasional usage. It died after 5-6 years... only TV I've ever had totally die.
Ask.com
ask.com › home › news
Troubleshooting Guide: Common Vizio TV Problems and How to Fix Them - Ask.com
May 21, 2025 - Lastly, ensure that your TV’s firmware is up to date. Manufacturers often release firmware updates that can address various issues and improve overall performance. Check Vizio’s official website for any available firmware updates and follow their instructions for installation.
Flatscreentech
flatscreentech.com › fix-vizio-tv-black-screen-of-death
How to Fix the Notorious Vizio TV Black Screen of Death – FlatScreenTech.com – LED/LCD, OLED, Smart TV Info & Repair Blog
Screen flashing on & off on an LG 49LF5500 LED TV (LED backlights problem fix) May 27, 2020 ... My Vizio D40F-G9 TV’s screen went blank, but the flashlight test described in this article showed that there was a faint image on the screen. So, I replaced the main power/inverter board as ...
Amazon
amazon.com › VIZIO-D-40-Class-Smart › dp › B07J1TZ6M9
Amazon.com: VIZIO D-Series 40” 1080p Class Smart TV - D40f-G9, 2018 : Electronics
Vizio 40 D40F-G9 Full HD 1080p HDMI USB LAN Smart LED TV · Blu-ray · Brief content visible, double tap to read full content. Full content visible, double tap to read brief content. Dad Reviews with @LaneVids · Earns commissions · Customer ReviewBest Smart TV?