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My screen goes blank when I plug in the AC power cord. Someone told me the inverter board may be bad

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Check your power suply and adapter properly waltage give and also check earthing worked properly.

Posted on Oct 14, 2008

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Tv has picture for 3 seconds then goes blank. Sound is good.I was told that the backlight or inverter boards were bad so I replaced both of them still not working.Can someone please offer some help.


There is a flat cable coming from the bottom of the screen and ends in a circuit board usually under a metal cover. This board is the problem. You can get a replacement at:
TV Parts Universal TV Stands DLP Chips ShopJimmy

Sep 26, 2015 | LG Televison & Video

1 Answer

I have an HP Pavillion dv9000. I RARELY use it, but my screen is blank. The power and lcd lights come on, but the screen is blank. I've taken the battery out, connected the power cord and turned the...


This might be a sign of a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Test with an external monitor attached to the laptop. If you get display on the external monitor, then this confirms the case.

Aug 21, 2010 | HP Pavilion dv9000z Notebook

1 Answer

The screen goes very nearly blank on battery


Your inverter board might be going bad. Google your laptop model and should be able to find a replacement inverter board.

Mar 29, 2010 | Lenovo Thinkpad T60 Notebook

1 Answer

When i start up my dell inspiron 1521 it goes into startup mode then screen goes black.took the power cord out n it will start up plug it back in the screen will go blank again.it will run on battery n the...


I have a Dell Inspiron 1525 and had the same exact problem. I finally called Dell and they sent a tech out. They replaced my power cord and all the software. The reason for this is because Dell Inspirons has a default in the AC cords. Sounds like the AC power cord is the problem. You could find someone who has this cord and test your Inspiron with it or try calling Dell! It worked for me.

Jan 28, 2010 | Dell Keyboard for Inspiron 1420, 1520,...

2 Answers

Repalaced bad capaitor(bulge on top) Now powers up. snowy with sound and picture goes blank. With nothing on screen. Tried to use remote but nothing shows up on screen. Note the snow is from not being...


When the filter caps went bad, the power supply output will be AC and feeding the circuits which can damaged the parts on the board. Check to see if you have the 12 or 18v feeding the back light invereter board. There are surface mounted fuses on the inverter board also. Send me good pictures of the whole back where all the boards are and close up picture of the inverter board, may be I walk you through. budmrtn@aol.com

Dec 10, 2009 | Westinghouse SK-19H210S Television

1 Answer

Hp w2207h screen in blank but flashlight shows icons are


The power supply-inverter board is probably at fault. Remove the back cover and locate the standard ac power cord connector. The board that the power input connector is soldered to is your power supply - inverter board. Check the electrolytic capacitors on the board. They probably went bad. A visual inspection is usually enough to find out which ones are bad. They will be either bulging or cracked at the top and leaking fluid. I usually replace all of the capacitors that have the same rating whether they look bad or not. Will save you another repair later. If the caps don't look bad, you can take the board to your local tv repair shop and have the caps checked with a esr tester. It's more accurate and they can be tested with the caps in place. Hope this helps.

Oct 10, 2009 | HP Computers & Internet

2 Answers

I turn on my computer but the screen is still black


think you might have a failed screen inverter (FL inverter); this problem is very common with laptops. The inverter board acts as a power supply for the LCD screen backlight bulb, it converts low voltage DC power into high voltage AC. On most laptops the inverter board is located inside the display assembly below the LCD screen and you can get access to it if you remove the screen bezel (LCD mask). When the screen inverter goes bad the backlight will not turn on anymore or it turns on for a short time and then goes off, but you still can see a faint image on the screen and the external monitor works just fine. First of all I would make sure it’s not just a loose connection and reseat connectors on the inverter (it looks like you already done this part). Next, I would try replacing the inverter board. It might fix your problem with the backlight. It’s possible that you have a faulty cable, bad motherboard or even bad LCD screen, but I would try replacing the screen inverter first.

Oct 06, 2008 | Toshiba Satellite Pro 4600 Notebook

1 Answer

Inspiron 5160 screen is blank


It seems to me the LCD cable is either not properly unplugged or LCD ha gone bad.
Connect external monitor to the laptop and check if you have the Video on the external monior. If everything looks fine on external monitor then you can get the LCD replaced.
In case system does not power up and there are no indications of power.
Here are the steps:
Connect only the AC Adapter and take the battery out.
Check if you have a green led lit on the AC Adapter.
If AC Adapter does not has a green led please replace it with a known good AC Adapter.
If the AC Adapter has a green led but still no power it can be the system board which has gone bad.

Sep 25, 2008 | Dell Inspiron 5160 Notebook

2 Answers

Maxent MX-27X2 no video,but sound


may not be the inverter but the main board bad
nesco

Dec 30, 2007 | Televison & Video

1 Answer

Screen goes blank


Hi jkm007, Sounds like the back light inverter board is bad. It's a very common problem. LCD's use four small cold compact fluorescent bulbs to back light the display. (thats what gives the LCD it's brightness allowing you to see it) The inverter board runs these lights and when they go bad they will typically show symptoms like you have or the monitor power light comes on and you have either no display or a very dim display. If you ever have one that has no display but the power light is on you can check by shining a flashlight directly into the LCD from the front (right into the screen) if you can see an image then it's either the inverter board (most likely) or the CCFL bulbs have gone bad. The inverter board and CCFL's are replaceable. Good Luck, El Duderino

Nov 12, 2006 | Videoseven V7 L19PS 19" LCD Monitor

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