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

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Compaq Presario C300. After a few hours of use coloured horizontal lines start to appear then flicker down the screen. If I close it and leave it a few hours it's fine again.

Usually happens whilst using the internet.

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Overheating issues. Clean the heat sink and fan or send it away for repair.

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SOURCE: I turn on my compaq presario c300 and it

Power-On Password Compaq Presario C300

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greg_margo
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SOURCE: Compaq Presario laptop C300 - issues (orange light)

Sometimes when a PC gets stuck in hibernation mode, the only way to reset it is to remove the CMOS battery for 10 minutes and replacing it. It resembles a large watch battery and is usually located near the center of the motherboard.

Posted on Dec 16, 2009

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I haveMy compaq presario CQ40 and my monitor screen got flicker always for past few days and more red horizantal lines @bottom of the screen, where i couldn't see the data,time,date... Plz help me...


This is usually a sign of either a bad LCD screen cable, a bad LCD screen, or a bad display adapter.
If you connect an external monitor & you get a picture without these red horizontal lines, then your display adapter is OK.
Diagnosing a bad LCD screen cable or a bad LCD screen requires that you disassemble the LCD screen panel, & swap them one at a time with a matching part. This way you can identify which part is causing the problem & replace it.

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My Pres C300 laptop works fine with an attached monitor. But its own LCD screen is currently having 3 equal horizontal sections. First (top) section is normal, second flickers and is normal when pressed,...


Hello,

Since the laptop works fine with an attached monitor, it means the problem is the inverter.

The problem with your laptop screen is that the inverter is malfunctioning, that is why you have those three equal horizontal sections.

Change the inverter of your laptop screen and you will see that the screen will be stable back.

Take care.

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Try reseating the LCD cable to the video card. If no change, then you will most likely need a replacement LCD (Roughly $150 on EBay)

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Hi there.
It sounds like you may have a loose inverter cable or the ribbon cable behind the screen is loose.
Is the machine in warranty? I

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Fine horizontal lines on the screen


this may be due to fault in your display panel, check it by some hardware professional nearest to you

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I wouldn't attempt as the capacitors on a tv store around 25000 volts this is more than enough to kill you and they keep there charge even when the tv is off. Either take it to a repair shop or put that money towards buying a new tv - Do not even attempt to open the tv. (It sounds like maybe a tube has gone or the electromagnet that makes the beam move vertically is gone.

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Try reloading the drivers, delete the device in device manager and reboot. It should then pick up the drivers and reload them, if that does not work I would suspect the screen is on its way out (flickering normally means the screen or its connection is bad)

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