Question about Compaq Presario Notebook

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Compaq Presario c300 power light blinks..

I have a Compaq Presario c300. When I plug in the AC Adapter... it runs fine for a good while, but then just cuts off. I try to power it back on, but the lightning bolt light on the front blinks 3 times... that's it.

When I leave it alone for a good while... sometimes I'm able to cut it back on again....

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  • dannywestjon Nov 28, 2008

    Thanks for the quick reply... this laptop is at least 3 years old. There's another adapter I used... and it doesn't respond when I hit the power button at all, but the lightning light flickers on and back off again when I use it.

    Since it consistently produces one error (3 lightning flashes when the power button is pressed) with one adapter, and another error (just a flicker on the lightning light when plugged in, then nothing on pressing power button). Both adapters are the same, and are made for the Presario c300.

    Being used to printers flashing lights and giving codes by the sequence of light-flashes and such... I was thinking maybe the Presario was doing the same thing. I was curious what the "blink, blink, blink" meant. I just wanted to be sure I was "barking up the right tree" by getting another power adapter...



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Take off cmos battery and sort battery pins this will solve yours problem try it thanks

Posted on Feb 14, 2011

  • david michael walsh Feb 26, 2013

    absolutly brilliant,i have spent hours trying to get my laptop to boot, thanks .


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It sounds to me like there's a short in the AC adapters causing it to have enough power to charge the unit when it's not pulling power, but once it starts pulling power, it basically becomes overwhelmed and can't do both power and charge. There's also the chance that the DC jack [which the AC adapter plugs into] is bad. However I'd suggest checking the adapter first because it's simple to obtain a new one and if it doesn't work, you can most likely just return it and say it doesn't work as opposed to a dc jack being repaired which would have to be done by a professional with the skills to handle it [of course unless it's under warrenty, less than a year old, but judging by the model I'd say it's probably not]

Posted on Nov 27, 2008

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That may not be a problem with the AC adapter. After connecting to the wall socket and switch on and check the output voltage at the DC out. if that is OK, the problem is most likely with the motherboard.Either with the power jack or there is mosfets & capacitors in the power up & charging circuit as well as other small components that may fail overtime or by hard use.. A good motherboard chiplevel technician can easily fix it for you. Hope this may help.

Posted on Dec 01, 2012

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Posted on Jan 02, 2017

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SOURCE: Flashing lightning bolt on Compaq C300

i think the battery is depleted so the power supply can no longer charge the battery

Posted on Dec 09, 2008

  • 6 Answers

SOURCE: Compaq M2000 laptop lighting bolt flash 3 times wont start

Could be a bad mother board or a hard drive..see if you can connect the hard drive with a USB on another machine and run a test on it...

Posted on May 28, 2009

  • 3 Answers

SOURCE: C500 Laptop won't come on power button just flashes

Have you tried attaching an external monitor when the LCD screen is disconnected from the motherboard? this connector is located under the keyboard strip – a piece of plastic just above the keyboard.
If it works, this way, then the video cable isn’t seated properly in the connector on the back of the screen. Plugging the video cable back in should fix the problem.
I don’t know how comfortable you are with taking apart laptops but I think that this information could be useful for you.

Posted on Sep 28, 2009

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