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A four or five? yr. old Compaq presario 1692 (hand me down) will not power on once turned off...it is also very hard to turn off once it's safe. The on/off button seems 'flimsy'? It seems dead? No lights come on at all. Do you think it's due a battery?

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  • Joan Dillon Mar 10, 2009

    I'm hoping it's just a bad switch. Thanks for you help! :)
    If that's not it...I'll be back. ;)


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Hi im josh in cebu phils. may i help you?
Friend base from my experience in such stuff the problems you have mentioned always center at the push button problem. The dome behind the button is damage cut or dislocated or sometimes break and also the small spring dis aligned if there is a spring. it depends the model of the laptop. but as what i had experienced it is just the button of ON/OFF. to solve such problem you may go to the laptop service center near you and ask them for assistance or let them do the job. that's all friend hope i helped you.good luck

Posted on Mar 10, 2009

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Compaq presario CQ56-115DX with windows 7 turns off while working, won't come back on.


This is usually caused by excessive heat build up causing the motherboard to go into thermal protection. Make sure your fan openings are clear and blow out any dust that might have built up.. Also if you can hear the fan running (sounding like a plane taking off). Put your hand by the exhaust ports and see how much airflow is being pushed.. The fans can move allot of air when they spin fully up to speeds to allow max cooling. If you are getting hardly any airflow from it then you can either try to disassemble the laptop to clean out the blockage or take it to a qualified repair center or local computer shop to have it checked out..

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Blank screen and power light goes on and off


You don't give much information about your computer except the model #. Unplug the computer from the wall. Remove the battery. Press and hold down the power button for about i minute. Release it. Then put the battery back in and connect the cord to the wall. Try the power button again and post back what happens. How old is the computer, what operating system are you using and what were you doing when this happened.

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How to clean the fan of my computer


Regular maintenance of your Compaq Presario laptop helps to keep the machine running properly.


Keeping the fans clean is especially important, because the fans blow out hot air and bring in fresh air to cool down the laptop.


Fans attract dust, however, which can slow them down, resulting in a hot laptop.

If the laptop overheats, vital parts can cease functioning altogether.


Consequently, keeping your laptop's fans clean is crucial.


or you might want to remove it to get it clean


HP Presario C500 is a laptop that, like most other laptops, requires a clean, functioning fan in order to work properly.


If your fan is too full of dust to function properly or needs to be replaced because it is no longer working, then your computer could be in danger of overheating and crashing.


Instead of having to purchase a new laptop because your C500's fan has failed, remove it and clean the fan or replace it with a new one.


Turn off your computer and unplug all the cords and cables from it, even the power cable.


Turn the laptop over and remove the battery, then remove all the screws at the bottom of the computer with a Phillips-head screwdriver.


Remove the two face plates from the bottom of the computer and you'll see the hard drive and RAM below.

The face plates will come out easily once the screws are removed.


Remove the two screws holding the hard drive in place and then lift the hard drive out.


Remove the screw found directly below the hard drive.


Turn the laptop over again and pop off the keyboard.

If all the screws at the bottom of the computer where removed, then the keyboard will come right out.


Remove all the screws underneath the keyboard and case and then lift the case enough to access the fan assembly in your HP Presario C500.


Unhook the cable coming from the fan into the motherboard and remove the screws holding the fan in place, then pop the fan out of the computer.


Hope this helps






Oct 20, 2012 | Compaq PRESARIO C500 COMPATIBLE LAPTOP LCD...

1 Answer

How to clean the fan air


Regular maintenance of your Compaq Presario laptop helps to keep the machine running properly.


Keeping the fans clean is especially important, because the fans blow out hot air and bring in fresh air to cool down the laptop.


Fans attract dust, however, which can slow them down, resulting in a hot laptop.

If the laptop overheats, vital parts can cease functioning altogether.


Consequently, keeping your laptop's fans clean is crucial.


or Remove an HP Presario C500 Fan Assembly to clean it


HP Presario C500 is a laptop that, like most other laptops, requires a clean, functioning fan in order to work properly.


If your fan is too full of dust to function properly or needs to be replaced because it is no longer working, then your computer could be in danger of overheating and crashing.


Instead of having to purchase a new laptop because your C500's fan has failed, remove it and clean the fan or replace it with a new one.


Turn off your computer and unplug all the cords and cables from it, even the power cable.


Turn the laptop over and remove the battery, then remove all the screws at the bottom of the computer with a Phillips-head screwdriver.


Remove the two face plates from the bottom of the computer and you'll see the hard drive and RAM below.

The face plates will come out easily once the screws are removed.


Remove the two screws holding the hard drive in place and then lift the hard drive out.


Remove the screw found directly below the hard drive.


Turn the laptop over again and pop off the keyboard.

If all the screws at the bottom of the computer where removed, then the keyboard will come right out.


Remove all the screws underneath the keyboard and case and then lift the case enough to access the fan assembly in your HP Presario C500.


Unhook the cable coming from the fan into the motherboard and remove the screws holding the fan in place, then pop the fan out of the computer.


Hope this helps



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1 Answer

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1 Answer

Replacing the OEM 18.5 V 3.5 A ac adapter with an 19V 4.74 A adapter for my c551nr compaq, should not give me problems, will it? It should be within spec, hopefully.


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Output: DC18.5V 3.5A
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But it's OK to use a 90w 19V 4.74A adapter on your laptop only if the connector tip fits your laptop.

Thefollowing three conditions should be met for you to use an ac adpater safely. 1)Output Voltage is within +/- 5% of your old charger's output.
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2) Output Current is the same or higher than that of your old charger.
For example, ifyour original adapter provides 3.42 Amps, then you can use a charger thatprovides 3.42 Amps, 3.9 Amps or higher.
3) Connector tip must fit securely into your laptop.

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2 Answers

Compaq presario starts but will not boot up


Check whether your CPU fan is working. It could be due to Fan malfunction of the cabinet also. Seek technician's help, if not resolved

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