LCD & LED TV Repair - No Picture No Image & Blank Black Screen Flashlight Test - Fix LCD & LED TVs

LED & LCD TV How to Diagnose Symptom of No Image on the Screen

Tutorial for Samsung TV No Image on Screen
Tutorial for Vizio TV No Image on Screen
Tutorial for Sony TV No Image on Screen

This flashlight test will show how to identify if you have any video appearing on the screen and whether or not you have backlights. Within this test, we will show how to determine if the problem is a bad t-con board, bad main board or bad backlight inverters for LCD TVs or LED driver for LED TVs.
Most LCD TVs are made up of a main board, a t-con board, power supply board and backlight inverters. Some TVs have one backlight inverter, some TVs have two backlight inverters and some have the backlight inverter built into the power supply board.
Most LED TVs will have a t-con board, a power supply board, a main board and an LED Driver board. Some LED TVs will have the LED driver board built into the power supply board.
If you have no picture on your screen, the first thing we will want to look at is to see if we have backlights or not. You can do this in a few different ways. The first is by looking through the back of your TV and seeing if you can see white lights shinning through holes on the panel.
You can do this a few different ways. The first is by looking through the vent holes on the back cover of your TV and seeing if you can see white lights shinning through the holes on the panel. Be sure to turn off all the lights in the room. As you can see on the screen, we can see the backlight is on through the top vent on the TV.
If it is too difficult to notice if your backlights are on or not, with the back cover still on, you will need to remove the back cover of your TV and look for the light shining through the panel.
Here is what the chassis looks like with the back cover removed and the backlights working. Once you have determined if you have backlights or not, you can then move on to the next steps.
If your backlights are working, but you have no image on the screen, that means the problem is either the t-con board or the main board. Next, you will want to see if you can hear audio. If you cannot hear audio, try and remember if you had audio immediately after the TV image went away on the screen the original time. Or you can also cycle through the inputs to see if you can hear any audio on any of the inputs. For example you could connect your cable box to your TV and try to find the input for that cable box knowing that it would be sending audio to the TV.
If you do have audio and you do have backlights, I recommend starting by replacing the t-con board as that will be the fix, the majority of the time. If you definitely have no audio and you do have backlights, then the problem could either be the t-con board or the main board. You will need to replace each board individually to see which one fixes the problem.
If you do not have backlights, you will want to turn all of the lights off in the room and get a flashlight. Apply power to your TV and press the menu button on your remote to pull up the menu on the screen. You will not be able to see the menu until you shine a flashlight on the screen.
You may need to twist the flashlight and try different angles to be able to see the menu. As you can see on our screen, the menu shows up and you can even read the AV1 on the screen.
This shows that the TV has no backlights, but the image is showing up on the screen, thus our inverter and LED driver is bad and our T-con and main board are good.
You can see on our screen that I can turn the menu on and off and the image appears and then disappears. At this point you will want to replace the inverter or LED driver or the power supply if it has the inverter or LED driver on it.
So as a brief overview, if your TV does have backlights and has audio, I recommend replacing the t-con board first. If your TV does have backlights but does not have audio, then it is either a bad t-con board or main board, and each board will need to be replaced individually to see which one fixes the problem. If you don't have backlights, but you see an image on the screen with the flashlight, that means that your main board and t-con board are good and that you will need to replace the backlight inverter or backlight inverters on your LCD TV and the LED Driver on your LED TV.

TV Repair Made Easy™

[samrmn]

I don’t who gave this video a thumb down! I found it very helpful and I know absolutely nothing about electronics. My worthless 2.5 year old LG tv has sound, but no picture and I’m going to try all the remedies suggested here and hopefully, one will work. Those of you giving thumb down must remember that this is a free service. Be grateful, just saying. Please know that I’m grateful even if none of your suggestions works.

[Leslie.Draper]

This video is perfect! Well thought out and made simple. No mumbo jumbo and junk time. All great information. Youtube should have this a a standard for tech videos. Well done, man, well done!

[dblanco]

6 years later and this is the most helpful video period. These techniques are still helpful for new up to date TVs in the market. I will definitely be trying to fix my tv now that’s it’s pretty simple. Thank you!

[x.figaro]

I followed your videos. My TCL TV had a black screen. I bought the parts from you, as recommended by Tampa Tec, and fixed it myself. all for about $60 total, including shipping . Thanks!!

[tripleatriplea]

Tv creaters be like “Hey how do we get twice as more money from folks “

Employees :Let’s make TVs that goes out or stop working for no reason after a few small years of it being used but u never dropped it or damaged it”

Manager: Make it happen

[doug]

THANK YOU! I had a 60" and a 48" fried from lightning this last weekend. Watched the video and ordered the parts. They came today, very fast. Both tv's are fixed!!! Awesome, thank you guys!

[richardcrawford]

Great analysis i was able to narrow down my problem just by watching you you tube video.

[scottcarlson]

Had a cheapie $100 tv/monitor used for our security cameras that went dark. Did the tests in the vid, ordered the part and for $14, saved the tv. Thank

[sherryrand]

Jimmy!!! You are the tops! This video was exactly what I needed. Your diagnostic approach was extremely straight forward, and it allowed me to determine exactly what was wrong with my LCD TV. I am now the proud owner of a new LCD backlight inverter, and a perfectly working television...all thanks to you!!! I will recommend your channel at every opportunity. Happy New Year!!! :)

[navarro]

Dude you Rock!!!! Thank youin Advance before I even try to diagnose my TV. I got a Sharp lc-32Q5200u and the screen is black.

[cynthamoon]

Great teaching to test and know for sure what to fix. Keep up the great teaching method

[motormouthalmighty]

NOW THAT IS A GOOD, CLEAR,CONCISE AND INFORMATIVE TUTORIAL VIDEO YOU SEE GENTLEMEN, NO NEED FOR THINGS TO BE DRAGGED OUT FOR FIFTY FIVE MINUTES OR RUSHED THROUGH AT THE SPEED OF SOUND GOOD MAN! GOOD MAN YOU SEE! IN LIFE, JUST FOLLOW THE INSTRUCTIONS!

[updatesdaily]

Bro my LCD TV lost display but audio is present...

[presidentc]

I'm just gonna buy a new TV, this is all too complicated.

[erauw]

Hi, looking for help try and fix ore 60" Samsung LEDTV 6050 model UN60EH6050. When we turn it on we have volume but no picture just black/slight purple tinge and we tried the flashlight but can't see anything or menu. We looked through the vents in the bottom and we can see little white lights. Whats your thought on this to help us narrow this down to the right part? Thanks Dave

[kameswararao]

Perfect explanation, without time killing. All the best friend.

[shopjimmy]

for watching our TV repair video! Due to YouTube policy changes, we are no longer answering tech support questions in the comments section. We apologize for the inconvenience. If you need additional tech support, please visit FixYa.com or contact your local TV repair shop. Good luck and let's fix your TV today!

[ahmadjabr]

I have LG 70" 70LB659y-ta model
The screen works good for few seconds then its black i did the flash test and i can see image and the voice is working

[adrianparada]

I have a vizio 55 inch! When turned on images and backlight comes on for 2 seconds with audio then backlight shuts off!! Flashlight shows images and I'm still getting sound!! I check power going to the inverter board I'm supposed to get 96 volts it's only getting 26.4 volts!! Could it be a bad power supply board??

[cookt]

dis the flashlight test saw the image went to menu while I could see the image went to picture scrolled down to reset picture and back came the picture
thank you and thanks to all the people on the university of utube who post these how to fix videos