Question about HP Compaq Presario C500t Notebook

1 Answer

Power button has light turning on and off with no other signals !!

Hi Shah...I own a HP compaq (presario c500) - been just 6 months. The power signal continuously turns on and off when I switch the computer on. The screen is blank and there are no other signals such as battery/charger being displayed. I have tried removing the battery and connected the laptop to AC power only - but to no avail.

Will appreciate your assistance.

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  • Anonymous Nov 11, 2008

    i have exactly the same problem my batter wont charge either

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  • 318 Answers

Try,,holding the delete key down as it is starting up,,,will the computer boot into Bios?
do you see any information on the screen when you start the computer at all?

Posted on Jan 16, 2009

3 Suggested Answers

confusedbrit
  • 38 Answers

SOURCE: power singal turns off and on !

Contact HP this is a serious fault and it should still be in warantee so they should fix it for free.

Posted on Aug 20, 2008

decenamarcar
  • 31 Answers

SOURCE: Power button light turns on and off continuously with no other signals appearing!

just repaired one with the same problem. I finally installed new power button board, and motherboard. good luck and hope this will solve ur problem. By the way try the new power button board first it may save ya the cost of a new motherboard. Joe

Posted on Nov 14, 2011

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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Power button light turns on and off continuously with no other signals appearing!


Just repaired one with the same problem. I finally installed new power button board, and motherboard. good luck and hope this will solve ur problem. By the way try the new power button board first it may save ya the cost of a new motherboard. Joe

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Contact HP this is a serious fault and it should still be in warantee so they should fix it for free.

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Comp will not turn on also see lightning bolt display


Hi All,


This happens because of static energy storing in the motherboard components.

We can try power drain to resolve this issue.


Try doing power drain by taking out the battery & keep holding down the power button for complete one minute to drain out the power from the computer components. Restart the computer after putting the battery in.
Try restarting the computer only with the AC power, without the battery & vice-versa.

That should resolve the issue, if the issue persists, then you have to contact service center.


Hope that information helped you!!

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