Sharp tv backlight inverter

Forums New posts Search forums. Articles Top Articles Search resources. Members Current visitors. Log in Register. Search titles only. Search Advanced search…. New posts. Search forums. Log in. Welcome to our site! Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

To participate you need to register. Registration is free. Click here to register now. Forums Electronic Requests Repairing Electronics.

JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. LCD backlight problem? Thread starter dirtyb15 Start date Jun 4, Status Not open for further replies.

Hi all. It is in great shape otherwise so id like to fix it if i can. Basically the backlight wont turn on 19 out of 20 times when you power the tv up. Eventually if you unplug it and plug it in it will turn onand its fine till you power the tv off. When it finally does turn on it says it had a lamp error and i have to reset the error. I really dont want to leave it on 24 hours a day and onn vr qr code hoping i can fix it.

Does this sound like a faulty inverter? If so, can this be repaired or do i need to find another board? Thanks in advance for any help. Last edited: Jun 4, You don't mention the model? You can simply make sure they are tightened properly, or Sharp provide some modified screws to replace them, basically screws with shake-proof washers built-in.

If that doesn't cure it, again depending on model, on some you need to replace the large string of opto-couplers on the inverter board.

But if you're lucky, it's just the screws. Thanks for the reply nigel, ill try that!. The set is at home or i would have posted the model number cant remember off hand. It has the seperate box for inputs ect, so it is older.

Well, there are 4 inverter boards, and i tightened all the screws seemed tight alreadyand same symptoms. What should i check next?

sharp tv backlight inverter

I do not, ill start my search.Register to activate your warranty, quickly access information about your product and receive software updates. On the back of the TV on a sticker that shows a bar code and serial number.

This sticker may be on either the right or left side, depending on the model; but is normally located in the lower half of the back of the TV. The model number may also be visible on the side of the TV panel.

Please check the inside of the microwave first before attempting to unmount or remove a built-in unit. Required: Upload your bill of sale, invoice, or a picture of the model label. At this time we do not have an online store to purchase accessories.

sharp tv backlight inverter

All fields are required. By clicking subscribe you are agreeing to receiving email communication from Sharp Electronics regarding Sharp consumer products. Your privacy is important to us. Click here to read our Privacy policy. Live Chat. Twitter Facebook. Register Your Product. Product Information. Select a date. Where can I find my model number? All Sharp products have a model number stated on them, some in more than one place.

SHARP BACKLIGHT INVERTER

The model number can be found on the original box the item was purchased in, on the product manual, and on the product in the locations described below. Helpful tip: For convenience, if you have a digital camera or smart phone, you may want to take a digital photo of the model number.

TV On the back of the TV on a sticker that shows a bar code and serial number. Audio Systems. Sound Bars. PCI Air Purifiers. Where can I find my serial number? All Sharp products have a serial number stated on them, some in more than one place. The serial number can be found on the original box the item was purchased in, on the product manual, and on the product in the locations described below.

Service Request. Contact Information. Address Address 1 is Required. Address 2. City City is Required. Zip Zip Code is Required. Alt Telephone. Email Email Address is Required. Please enter a valid Email Address. I would like to receive information about upgrades, new features, and special offers related to Sharp consumer products I would like to sign up for the newsletter to keep in touch with news and updates from Sharp.

Description of Issue Description of Issue Required. We are updating our live chat. Please check back soon!Menu Menu. Search Everywhere Threads This forum This thread.

Search titles only. Search Advanced search…. Everywhere Threads This forum This thread. Search Advanced…. Log in. Category 1 Category 2 Category 3 Category 4. Support UI. X Donate Contact us.

New posts Trending Search forums. What's new. New posts New profile posts Latest activity. Current visitors New profile posts Search profile posts Billboard Trophies. Community Question: Have you "cut the cord? How much does it cost to fix the backlight for tv screen? Sidebar Sidebar. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.

Status Not open for further replies. Previous Next Sort by votes. Can1neTrackers Prominent. May 16, 1 0 0.

How much does it cost to fix the backlight for tv screen?

My LG TV's screen blacking out is a common complaint. How much would it cost for me to get it fixed? Barty Admirable Moderator. Apr 16, 0 7, Depends on the specifics of the TV and your location.

Are you still within warranty? If so, reach out to the manufacturer. If not, generally speaking, it's more economical to buy a new TV that it is to repair one unless you can find the components cheap and are prepared to do the work yourself Jan 11, 0 19, In most cases its cheaper to just buy a new TV.

Even repaired its only time till another part breaks.JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. Coronavirus Update: We will stay open to ship all packages as normal for the time being.

We are located in California and Indianapolis so we will be shipping, accepting returns, and answering emails as long as we are not forced otherwise. Please give extra time for any delays the shipping companies may experience. Note: We will not be answering phone calls but will attend to all emails within 24 hours.

Email: website electropartsonline. ElectroParts carries TV backlight inverter boards at affordable prices. These units power the backlight on an LCD monitor and help you see the image on your screen more clearly. Our units are available from brands such as Vizio, LG, and Samsung. We provide a day warranty on all products and cover shipping both ways for returns and exchanges.

sharp tv backlight inverter

Don't see your item here? It's possible we have it but have not yet made a listing. Please check here for additional inventory. Items 31 - 40 of Shop now for TV backlight inverter boards. Real email address is required to social networks. Please enter your email address below to create account. Sign In. Registered Customers.

Create New Account? Or Sign In With. Sign in with Facebook. Sign in with Google. Create New Account. First Name.Replacing an inverter board costs significantly less than replacing the entire television and the process requires minimal technical expertise. Inverters put out a fairly high level of voltage to power and light up your LCD screen, with most inverters outputting in the to volt range.

A faulty or damaged inverter board can cause image distortion, dim your screen or prevent it from turning on. Turn your television on and shine a flashlight on the screen to look for an image. If you can see an image, then you likely have a bad inverter that needs replacement.

The inverter board keeps the backlight of the television on. Turn off your television and remove the power supply from the wall. Once you unplug the television, wait until the back of the television cools down and no longer feels warm to the touch. Place the anti-static wrist band on your wrist and remove the back panel on the television. On some televisions, you may find the panel on the front of the television. Use a Philips screwdriver to remove the screws and then use a flat-head screwdriver to gently remove the panel to access the electronics.

Look for a rectangular metal casing. LCD TVs have two inverter boards -- a slave and a master. You can find the boards on either side of the metal casing. You can access the boards without having to remove the metal casing, but you should remove them to make testing easier.

Use a Philips screwdriver to remove the screws and pull the casing off the board. Place the red probe on Pin 1 and place the black probe on any metal screw inside the casing to ground the multimeter and prevent shorting the inverter. Power on your television. You can have someone else help you with this process so that you don't lose contact with the pin and the screw on the inverter board. Take note of the reading from the multimeter.

Power off the television and test the other inverter using the same process. Compare the results of the two inverters. If you get no readings, you need to replace both inverters. If you get significantly different readings, replace the inverter with the lower value.

If both the readings come back with similar values, you may need to replace the backlight on your television. LCD inverter boards can provide a significant amount of power. Consider wearing plastic gloves to reduce the possibility of electrocuting yourself. If you don't have experience working with electronics, take your television into a repair shop for a professional evaluation.

Step 1. Step 2.JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. Coronavirus Update: We will stay open to ship all packages as normal for the time being. We are located in California and Indianapolis so we will be shipping, accepting returns, and answering emails as long as we are not forced otherwise.

Please give extra time for any delays the shipping companies may experience. Note: We will not be answering phone calls but will attend to all emails within 24 hours.

Email: website electropartsonline. ElectroParts carries TV backlight inverter boards at affordable prices. These units power the backlight on an LCD monitor and help you see the image on your screen more clearly. Our units are available from brands such as Vizio, LG, and Samsung. We provide a day warranty on all products and cover shipping both ways for returns and exchanges.

Don't see your item here? It's possible we have it but have not yet made a listing. Please check here for additional inventory. Items 91 - of Shop now for TV backlight inverter boards. Real email address is required to social networks. Please enter your email address below to create account. Sign In. Registered Customers.

Sharp TV Repair - How to Replace RUNTKA448WJQZ Power Supply/Backlight Inverter Boards - LCD Repair

Create New Account? Or Sign In With. Sign in with Facebook.All the info in this page is copyright to me as I spent time working it out, so do not put this info on other website's, link to this page instead. Warning: Only attempt this if you are competent to do so! There can be lethal voltages inside the TV even when its unplugged. I'm not liable if you damage yourself or your TV trying these repairs. Read the disclaimer. If your not sure, pay someone else to do it. My info will always be FREE.

But if this helps you, please consider a donation to help keep the site going. Its easy to think that because the TV is dead, it must be a bad power supply, so you replace the power supply and find the fault is still present In this TV, all the voltages are marked on the power supply connections, so its easy to confirm that the power supply is ok by testing all the voltages.

Some of the voltages are high and the board has to be live, so it goes without saying that you should be very careful when taking the voltage readings. IC is the main control chip, located at the top of the board, above and to the right of the analogue RGB PC input socket.

It recieves the 'turn on' signal from the power button or remote command and sends the signal to the rest of the the TV to start up. In TV's with this fault IC appears not to be sending out the start up signal.

Plug the TV in, wait 10 seconds, test the voltage, then press the power button, wait 10 seconds and test again. If pin 80 is reading 0 volts or very close to 0 volts on both tests, then its probable that IC is bad.

It should read 0 volts and then 3 volts or 3v then 0v depending on power state when power switch is pressed. Unless you have the tools required to remove a pin surface mount chip you will need to replace the board. We wait 10 seconds each time because this TV has an energy saving 'slow start' feature and when enabled the TV takes a few seconds to come on and we dont wanna confuse the readings. The TV starts ok, but then the screen goes blank, sound stays on and soon after the TV shuts down.

The power light turns red and flashes once every 1. This indicates either an inverter or backlight fault. While the power light is flashing red, press the menu button on the remote pointing it at the TV obviously! If the OPC light does not come on then it indicates an inverter fault, however if the OPC light starts flashing at the same rate as the power light this indicates that it is a backlight fault and this fix may help you.

The complete LCD screen assembly needs to be taken apart for this fix which is a delicate job and if you are not careful you can severely damage the screen making the TV useless so be careful!! The backlight tubes can be replaced if needed, but its usually a fault with the backlight connectors that causes one or a few tubes not to light.

If you own a CCFL tester that can test mm tubes you can test the tubes without taking the screen assembly apart. Remove the inverter board, connect one side of your tester to the metal chassis, and then probe each of the 18 backlight connectors.