Question about HP 530 Notebook PC

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No back on screen

I have replaced the screen and the invertor and I still get no back light there is a buzzing noice coming from the back left hand side as you look at the screen

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  • dixon_d4 Jan 26, 2009

    I REPLACED IT MYSELF

  • dixon_d4 Jan 27, 2009

    Thanks

  • Randall  Trahan
    Randall Trahan May 11, 2010

    That's what i thought. I'm going to leave your request open to see if one of the t.v. or electronics guys pick it up. a monitor is closer to a tv than a computer

  • Randall  Trahan
    Randall Trahan May 11, 2010

    Did you replace it yourself or did a repair shop do it?

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  • 17 Answers

Hi, sounds like a loose conection from the tube ( the actual bulb )
very tricky job to replace you have to be soooooooo gentle.
hope this helps

Posted on Feb 20, 2009

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1 Answer

I have replaced the main board, the power board and the video invertor board and still no back lights. can one ccfl cause all others to not come on? I do have voltage going to the invertor.


Hi Terry,
The only thing left is cfl tubes. Yes one bad cfl may cause this problem. There is feedback from each cfl and if this feedback is not available, the backlights may not start. Before checking cfls please check all the connectors from inverter to cfls for loose contact and corrosion.
Good luck.

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Hi, I have a Baird CN47BAIR TV, the screen goes black after a couple of minutes, however the sound is fine. There is a buzzing noise coming from the left hand PCB (as u look at it from back). Ideas?


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
Some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.
Here it seems that the back-light inverter board is at the left side of the TV [looking from back side]; covered with metal protection cover; can be isolated. Replace it.

Sep 09, 2015 | Televison & Video

1 Answer

Invertor problem bm49xx


It is easy to replace the inverter, unfortunately it is not easy to replace the back light. It is time to replace the whole screen.

Feb 18, 2014 | Computers & Internet

1 Answer

Polaroid LCD tv - model TLX-04244b . Flashes the blue polaroid screen then goes black ,I hear a buzz coming from the inverter board. I have replaced both inverter boards and the same problems exisis .


I just changed out the invertor boards and mine was fixed. I had the same problem. Im not a TV repair man but replace the board thats buzzing and it will work again.

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Thomson 27 LCDB 03B


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Jan 15, 2010 | Thomson LCDB 03B 27 in. Television

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Screen is getting darker


back lighting ? might be invertor board controls back lighting

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Why does it take 10 minutes for my LCD Legend tv


Sounds like you have a faulty capacitor on your invertor..Gently press on the screen when there is no picture.is there light on the screen? If so, there is backlight but no video..hence a mainboard or power supply problem..If there is no backlight then the problem is the invertors or the power supply not supplying 24volts. The invertor is located on left or right hand side of screen..Check that all connections are secured and not loose.Check that the power supply capacitor tops on the power supply do not have bulging tops..If not, and voltage is reaching the invertor, then remove the invertor and check for bad solder joints and leaking capacitors.

Oct 17, 2009 | Televison & Video

1 Answer

Cracked screen, dented top


I would say just the screen. You may have to bend the metal a little on the edges if needed.

Jun 19, 2009 | Acer Aspire 3680 Notebook

1 Answer

Laptop screen not working


Hi, I'm a laptop technician and if the screen is blank as in there is nothing showing on the screen at all (even when the laptop first starts up), but the laptop sounds like it is starting normally then the backlight or invertor for the laptop screen has probably failed. This is very common.

The easy way to check this is to plug the laptop into a normal PC monitor (if you can) via the monitor out port on the laptop - you may have to press Ctrl + F5 to get a display on the PC screen. If you can get the laptop to show an image on the PC screen then the main laptop itself is fine, and the problem is almost certainly a failed invertor or backlight.

Assuming you *could* see an image on the PC screen, you should then press Ctrl + F5 so that you *can't* see an image on the PC screen any more (this is very important). Next unplug the laptop from the PC monitor (if you did the above) and look VERY closely at the laptop screen. You will hopefully *just* make out a very, very feint and very dark image on the laptop screen. Bear in mind that you may need to re-boot the laptop to get a moving image that you can detect (like the Windows boot up screen for example). If you *can* see a very, very dark and feint image on the screen then the backlight has failed. If the screen is plain bright white or there is no image then the invertor has gone.

The invertor (or inverter as it is sometimes spelt) is a smaller circuit board that sits in the screen housing, the backlight is a very thin "flourescent" kind of tube light that is built into the screen itself. The invertor can be removed and replaced pretty easily by most competent people without much trouble (takes maybe 30-45 minutes to do). The backlight on the other hand is very hard to remove without damaging the screen itself and should only be attempted by a specialist laptop repair company.

Both the invertor and backlight parts are specific to the screen so you must get exactly the same to replace the faulty one with. Online auctions are a good place to get s/hand or new spares, just tap in the *exact* part number or laptop model number and you will usually find someone who has the bit you need.

I hope this helps.

Jan 03, 2009 | Acer Aspire 5002WLCi Notebook

1 Answer

Still having the problem with the LCD screen


Most likely it is the inverter and or the back plain lamps that are failing. In screens where these are replaceable, I always replaced both the lamps and the inverters at the same time. A bad lamp can damage an inverter.

Jerry G.

May 02, 2008 | Dell Inspiron 1300 Notebook

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