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Laptop does not turn on
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tajar



Joined: 18 Mar 2017
Posts: 3

PostPosted: Wed Mar 29, 2017 5:38 pm    Post subject: Laptop does not turn on Reply with quote

I have a laptop compaq cq71 which have the bellow problem

The laptop does not turn on, when i insert the dc jack its light turn on and after 30 sec it turn off,
After that the board seems dead, nother of leds is on

Can anybody give me any advice what part of board should i measure.
Can it be any foult of southbridge or northbridge?

Can it be any mofset problem.

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KKEEVV



Joined: 10 Jul 2017
Posts: 2

PostPosted: Mon Jul 10, 2017 9:02 am    Post subject: Reply with quote

I'm no expert by any means, but I'm thinking leaky capacitors. Only because that seems to be my biggest problem.

How old is the unit? I ask because I have an old HP mointor that would cycle on and off. After tearing into it I isolated a handful of faulty CAPs.

Or it could be as simple as a failed solder point. When the circuit is cool it has continuity, but when it heats up it creates an open circuit.

But like I stated I'm no expert. but I thought i'd throw in my two pennies.
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carlm21



Joined: 06 Jul 2018
Posts: 1

PostPosted: Fri Jul 06, 2018 7:15 am    Post subject: Reply with quote

check the ram. May be there is an issue.
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kevincooper



Joined: 20 Dec 2018
Posts: 1

PostPosted: Thu Dec 20, 2018 9:19 am    Post subject: Reply with quote

Try taking out any cords and take out the battery and hold the power button down for 30 seconds then put the cord back in and try to turn it on, then put battery back in.
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techk47



Joined: 07 Aug 2019
Posts: 1

PostPosted: Wed Aug 07, 2019 5:53 am    Post subject: Reply with quote

try to charge it for at least 2 hrs and see if turns on.
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weldontmurphy



Joined: 16 Apr 2020
Posts: 1

PostPosted: Thu Apr 16, 2020 7:21 am    Post subject: Reply with quote

Are you absolutely sure the problem is hardware?
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PostPosted: Mon May 04, 2020 7:13 pm    Post subject: Reply with quote

I think this is a ram problem, however do you have valid warranty of this laptop?
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PostPosted: Mon May 04, 2020 7:17 pm    Post subject: Reply with quote

Take the battery and Ram out and clean it then try to start it. Other wise I think it might be a mother board issue.
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Martin1990
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PostPosted: Wed Jul 08, 2020 6:26 am    Post subject: Is the problem solved? Reply with quote

If it is not resolved, it is best to call the manufacturer
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malkova



Joined: 12 Apr 2019
Posts: 5

PostPosted: Wed Jul 29, 2020 7:53 am    Post subject: Reply with quote

I have been looking for this information for a long time, I was very surprised when I found it here.
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