Question about HP 435768-001 - Compaq Presario C300 Series 15.4 WXGA LCD Display

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I had to replace the hinges on my c300. the screen worked before i unpluged everything now i only see a faint screen. any suggestions

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Sounds like a backlight inverter issue. Perhaps during the repair the wires disconnected or there was a short circuit. You should look for improper connections from the display. If every connector is ok, then maybe you need to replace the inverter.

Posted on Sep 07, 2009

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Yes! please replace your inverter board, you can buy it from ebay or

Posted on Sep 22, 2013


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Posted on Jan 02, 2017

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1 Answer

Faint video on laptop

The lid closure hinges is where the laptop's screen is hinged to the other half of the laptop. Personally, I'd rather have it sent to a specialist to deal with it because those parts are very delicate.

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Check first of all that the lid cut off switch is not sticking, temporarily disconnect this to be sure.
If you are getting an image on an external screen, the problem will most likely lie in two areas:


Take the laptop into a dark room and power it on. If you notice a faint image on the screen that is very dim, it is the fault of the screen backlight (replace the laptop screen)

If there is NO image even a faint one, it is the fault of the inverter (replace inverter).

To access both, you will need to remove the screen bezel, the battery and the switch cover panel. Getting the inverter off is a matter of unplugging it from the VGA cable and removing the pink and white HT wires to the screen ( NO power must be going through the laptop as you do this because the inverter converts the 19 volts DC into 1000 volts to power the screen.

Getting the screen off involves the above than unscrewing the cover retaining screws and the hinge supports and carefully undoing the vga ribbon cable

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I have a broken hinge on a c300 . how do you replace that hinge. what all has to be disassembled?

Dear friend,
Try to find the similar hinge on your c300 at the nearest HP dealer, if you can't disassemble it just bring your laptop and ask for assistant, as far as I can remember, the hinge is sold as part at affordable price.

Best Regards,

Sep 09, 2009 | HP 435768-001 - Compaq Presario C300...

1 Answer

Compaq C300 LCD

I can supply a brand new replacement LCD screen for £45.00 & VAT,
Require it


Mar 02, 2009 | HP 435768-001 - Compaq Presario C300...

1 Answer

Laptop does not power up

maybe you accidentally unplugged power wiring for your laptop when you are trying to replace a hinge.

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How to take apart the case of a Compaq Presario C501NR Notebook PC so i can see the motherboard?


According to HP, the C500 guide isn't readily available but you can use the C300 manual listed here

You will need to start with the Removal and Replacement Procedure section.


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you will find small end rubber ( round flat) that is on the top 4 pcs and the bottom 2 pcs, remove this and keep this for a while, then remove the screws that goes along w it.

from there you can find out how to remove the LCD

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I would suggest taking it onto a corner shop that specialises in this kind of thing. They may be able to fix the screen and then you can save your data that way.

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Laptop screen in complete darkness but external monitor works fine

Make sure to check that it's plugged in on both ends - at the motherboard and on back of the screen.

The other possibility is that your inverter got shorted out somewhere along the way. Try shining a flashlight on the screen - if the cable is plugged in ok you will see a faint imge.

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Under the right hand hinge, the plastic hinge cover has cut into one or more wires

Unplug the battery, unplug the mains, carefully undo the 2 screws immediately under the laptop AT THE TOP in the middle undet usb / VGA socket roughly (on the base)

the plastic panel around the power on button (and volume buttons) will pop out carefully

take off the hinge covers carefully

examine the wires... solder them, insulate ... you will see the problem

the laptop "strecthed" out with the screen open strecthes the nicked wire and it disconnects... when you shut it, it reconnects

that ok mate?

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