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When we try to turn on the laptop it makes 3-4 beeping sounds and never comes on. The screen stays black.

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It could be the RAM. Try taking the Ram out, clean it and the slots it fits into, (with a soft dry paintbrush) then replace it again. If you have more than one Ram stick, put one in first. Then restart your computer, if it does not work, take it out and put the other one in.

If it does work with the first one, then put the other one back in too and try to reboot again.
If it does work but only with one, then the other one is faulty.

Always make sure that you disconnect the computer from the mains before opening it.

I hope this helps

Posted on Nov 11, 2008

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Computer will turn on but will not boot up

Did this situation come with any beep sound. Because, most of the time, in this situation; the computer beeps. Here are some codes. Check if any of these condition apply to your system.

No Beeps Short, No power, Bad CPU/MB, Loose Peripherals
One Beep Everything is normal and Computer POSTed fine
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Sounds like a memory error. Try pulling out one stick at a time until it is able to boot. Assuming, of course, you have more than one stick. If not, buy or borrow a new stick and try that. With 3 beeps the bad stick is likely to be in DIMM slot 1.

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Computer beeping at you is usually a problem with the video card or memory. Try re-seating both and see if you still have the same problem. If you do, individually remove each component and power on to test if the beeps persist.

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Black screen at start up

Isolate the problem in the following order:

1. Make sure that your display monitor is working fine by checking it on another computer. Try to check the display cables from the PC to the monitor as well and make sure they are connected properly.

2. Check the RAM. If there is a problem with your system RAM, it will normally give certain indications like a series of beeps. Try to power on your PC without any RAM installed and you should hear a series of beeps. Count it and try to compare it by turning on the PC with the RAM installed. If it gives the same number of beeps with the RAM installed, then you most probably have a problem with your RAM. Sometimes, this problem could be resolved by reseating (removing and installing) the RAM. Take note that you should unplug the power cable before performing this step.

3. If your system has a built-in VGA display then skip this step. If your desktop has a VGA Card (the one connected to the monitor) then try to reseat this as well. Most of the time, especially on compaq machines, the VGA card has a tendency to get loose during shipment.

4. On rare cases, i encountered problem with the power supply. Check that the input voltage you're using is correct. Some desktops have 220/110V switches on their power supply. If it is switched to 220V and you're home electricity is 110V then you'll get undervoltage condition and therefore improper voltages will be produced. Please make sure about your home electricity rating, as making mistake here could cause a damaged power supply.

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Hi but sound silly but have you a brightness control anywhere on laptop try adjusting that...otherwise black screens= replacement parts!!

Nov 01, 2008 | HP Computers & Internet

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I can turn my laptop on but the screen is black


Do you hear a beeping sound when turning it on? Try connecting an external monitor (Desktop monitor) then press FN+F8 (Dell laptop only) and FN+F4 (HP laptop only). If it works on an external monitor, you may need to contact your computer manufacturer. check the warranty and request for an LCD monitor replacement.

If you hear a beeping sound when turning on your laptop or no power (no light). you may need to reseat the memory (RAM) or check the AC adapter (power adapter).

Let me also know the system model and computer manufacturer.

Keep me posted.


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check for loose video connectors, power cables (of your monitor). Also try to turn off your computer by pressing and holding the power button. (you know your computer is off if it doesn't make any sound or vibration)
if all else fails, power up your computer and listen for a tone/beep sound. If there is a long beep sound probably your memory (RAM) is loose, defective or faulty. If you hear a tone/beep in a patern (like long-short-long, or any other pattern) then probably your VIDEO CARD is loose, defective or faulty.

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