Question about HP B5P37UTABA probook 4540s notebook pc energy star b5p37ut

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Blue power light is flashing on my hp laptop

The blue power light keeps flashing blue and the laptop will not power up with either the battery or mains lead

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The computer is in the "Sleep" state. The Service Manual is available at: http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c03758231-1.pdf

Posted on Nov 24, 2013

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Posted on Jan 02, 2017

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Maybe the battery is dead. Remove the power cord and see if you can work on the laptop on battery power for any length of time. if it goes off quickly.

A good power cord will not charge a dead battery. Batteries only have a useful life, then they have to be replaced.

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I imagine the orange flashing light is over the battery? The compaq laptops have a little blue light that will typically light up when it's plugged into the wall. If it is plugged in ensure that the little blue light is on. If it isnt you may have a n issue with your power supply unit, or there may be an issue with the port where the plug is plugged in. Thus causing the battery to be dead and the computer not power on. If you have any other compaq computers you can also try plugging in that power adapter, or try picking up a universal or another hp/compaq charger from somewhere such as best buy to test it out.

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you do know that the main batteries are "love to fail"
right,
just about all batteries do that in everything,
even the coin cell,inside can fail in 5years flat.

if power pack is 19vdc with volt meter, good !
the battery is next, yes it runs pc but can be bad.
a bad battery can still have power but overloads the charger chip
it really is an analog world. (reality)
if savvy , always keep a spare battery for moments like this.

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Since it sounds like an issue with the Power first try to release flea power.Disconnect the charger,remove battery,press and hold down the power button for 30 seconds.Reconnect the battery and charger.Turn on system and check if it turns on. For further help please check Dell Inspiron 1525 Manual. Also confirm if the light on the charger stays on,when connected to the system.

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HP Pavilion dv9700t battery dead, faint blue flash from plug


Check your mains adapter plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced.

If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard.
This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. I suggest you get a quote first.

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try taking the battery out, make sure the ac adaptor is not connected, hold down the power button for 60 secs and then put the battery back in and try turning it on.

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This is a dumb question i'm going to ask but is the power cord plugged in. Mine recently killed over. Come to find out it was the battery pack, which was fully charged, just didnt work anymore.

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Hi Iceprincess5

The three flashing lights indicate the battery is dead. Since it still wont power up with the cable plugged in I'd say the port has gone. Try wiggling the adapter about in the port to see if it begins to charge. If not then you would need to take it to a laptop repair centre to get a new dc port soldered on or buy a docking station.

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