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Tacolord Sanchez Posted on Sep 29, 2015
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Pavilion g7-1173dx possible screen inverter issue?

I'm trying to repair an HP Pavilion g7-1173dx laptop that will boot up normally and after a few minutes the backlight goes out and the screen becomes dark. If you shine a flashlight onto the screen you can see the image fine and on an external display there is no issue at all. Because of this I thought that the problem would be either the Inverter or the backlight itself, however when I disassembled the laptop it appeared as though this model has the light and inverter both inside the LCD screen? The screen model is LP173WD1 (TL)(C3) and I have replaced it with a proper replacement screen and the issue still continues. I know how to locate and replace inverters on other laptop models, but I just don't see one in this model which is what led me to believe it was in the screen. Any help would be appreciated

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Justin

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  • HP Master 2,072 Answers
  • Posted on Sep 29, 2015
Justin
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The inverter is almost always below the screen in the bezel. You should only need a plastic pry bar (cost about $3) and you pop the bezel off from the screen side usually, you may need to check for screws under any rubber stops on the screen too. After the bezel is off the inverter should be on the bottom with two plugs into it. Unplug, pull it out and swap.

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The hard drive has issues, the next step is to have it tested for possible replacement.
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Screen not lighting up on my hp pavilion

Try on an external monitor, if it works ok, you can rule out the graphics chip problem
If it does boot to an external monitor, the screen backlight / inverter has died and needs replacing

If it does not boot to an external monitor, the graphics (nvidia) chip has done the famous DV series trick of unsoldering itself and will need professionally reballed
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My HP Pavilion screen is black when I try to boot it up. Nothing shows on the screen but the button lights stay on. I contacted HP and they said I would have to send it in for $398 and Im not doing that.

Based upon the price, it sounds like this may be a "DVxxxx" series notebook. Those notebooks had issues with Video Cards; that caused the problem. There is some theory out there that says by "re heating" the graphics chip; you can connect it back to the system board. Some cases it works and sometimes not.

If you hook the computer up to an external monitor; do you see anything? If you DO see something, it's probably an Inverter or LCD screen. If you see nothing; it's possible it's a video card problem. One other thing I ran into on HP laptop's is that bad ram will cause them not to power on. Take out one stick, and try it . Hope that helps you out. Here is an article that is related to the HP video issues. http://techrxgb.com/2010/08/09/hp-pavilion-dv2000dv6000dv9000-and-compaq-presario-v3000v6000/
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At first, the green light was flickering into the bottom of my laptop. someone told me that its normal, so i decided to ignore it. then one night, as i used my laptop, i detected that it is starting to...

If you're talking about your screen, it's probably the inverter going bad.
You can go to insidemylaptop.com and click on Laptops, or HP, and then inverter. These will be on the right hand side of the screen and you will see what I'm talking about. You can probably get one from ebay for just a few dollars (just search Pavilion inverter, or dv4000 inverter). They aren't hard to replace and tey give very detailed instructions. Or you might be able to buy a used or new screen for your laptop and replace it for a bit more. If you take it to a repair shop they'll probably charge you a couple hundred dollars to do it.
Hope this helps
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My screen has gone totally black. rebooting

The most likely problem in this situation is that the inverter is burned out. Do you hear sound? If your computer boots and there is sound, it is definitely the inverter board. You might want to try to replace the inverter board. I think it's about $15 on ebay. If you are tech-savvy you can take the computer apart. The inverter is usually located below the LCD screen. for more info on replacing the inverter click here http://www.insidemylaptop.com/remove-lcd-screen-inverter-board-hp-pavilion-dv9000-laptop/
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Flickering is a back light issue, jumping around would be caused by the screens reaction to a bad inverter and so would the backlight as well. So flickering backlight and jumping would be a inverter issue causing both problems so I would replace them both.

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Quite often this is caused by someone changing the display type. There should be a function key control that allows you to view just your lcd display, an external display, or both. Try and change that setting and see if it will resolve your issue.
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It is either the inverter board or the bulb

If it looks pink in color than it is the bulb and that can be quite the intensive project to replace

If it is the inverter board than that is not so bad and you can pick up an inverter board on eBay usually for around $10 to $20 and that usually installs right under the LCD screen (usually screwed to the LCD screen)

The inverter board is what powers the light bulb the data cable is totally separate function.
If you can see data on the screen with a flashlight but there is absolutely no light coming from the screen at all ever than it is probably just the inverter board

But there is a possibility that you could order the inverter board and have it turn out to be the bulb and if that is the case then unless you are very comfortable taking apart laptops then maybe a new screen would be best since you practically have to take apart the LCD to change the bulb.

But screen cost around 100 to 150 on eBay so if you decide to do that then might as well try for a deal like this: (I just spotted this on eBay and it is for entire new top half of laptop with glossy screen and inverter board wire harness and all for the same price or less than just the screen http://cgi.ebay.com/HP-dv1000-Pavilion-14-1-BrightView-Glossy-LCD-screen_W0QQitemZ310102538774QQihZ021QQcategoryZ31569QQssPageNameZWD1VQQrdZ1QQcmdZViewItem#ebayphotohosting

That is guaranteed to solve your problem for sure.
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