Question about Compaq Presario 700 470024-192 Notebook

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Note book will not turn on... screen is black

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In order to help you diagnose this problem, I would like you to answer these questions:
1. When you try to power on the laptop, does the power LED power on?
2. If the power LED is on, did you try to wiggle the power cord & see the effect of this on the power LED? Does it wink?
3. Do you hear any beep sounds coming out of the laptop?
4. Did you try to boot up the laptop with all external devices disconnected?
5. Do you hear fan or hard drive activity from your laptop when you power it on?
6. Did you try to test it with an external monitor attached? Did you get any display on the external monitor?

Please answer these questions so that we could find out which part of the laptop is faulty, & what needs to be done next.

Thank you.

Posted on Nov 13, 2010


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Posted on Jan 02, 2017

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SOURCE: note book

You most likely have a defective screen - a defective inverter or a CCFL lamp or simply the video cable needs reseating. After reseating the video cable and the problem is still there then :- To determine if you have a LCD screen or video card problem, read this and follow the instructions. Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case. The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills. Check out for parts, repair service and DIY info.

Posted on Jun 04, 2009

  • 76630 Answers

SOURCE: hi my note book just makes bleeping noice and

More than likely this is a low battery, either the charger is defective or you need a new battery.

Posted on May 13, 2011

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