Question about HP Pavilion dv4-1145go Notebook

2 Answers

Hp dv4 no power

The power adapter is good but when I plug it into the laptop there are no signs of power

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  • Ray Bradley Oct 27, 2012

    Thank you but that didn't work. I think it is the motherboard

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On the DV4 that I'm working on, multiple known good chargers were tried and multiple batteries were tried. The laptop would not charge the batteries. Unlike other laptops this one will not work if the battery is removed on AC power.

I have replaced the DC Jack where the power cable plugs in. I believe this problem is with the mosfet on the motherboard as described in this thread.

Here are some pictures of the component on my motherboard.
General area
Specific Chipset surrounded in a yellow box

To be clear this is not the DC Jack where you plug in the cable from your charger. It's the other end of the wire inside the laptop below the battery if the battery is at the top.

I wish I knew more about electrics to repair this. The vietnemese poster suggested connecting the soldier pads, but I do not know if he meant to combine 1,2,3 and 5,6,7,8 or if he meant to connect 1 to 5 and 2, to 6, etc.

I believe this is the component diagram

Posted on Aug 22, 2013

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  • 57 Answers

First remove battery then use charger for 1 min

then attach battery then charge it if not

it is problem with *********** board

plese once check another adapter

Posted on Oct 25, 2012

  • aditya19818
    aditya19818 Oct 28, 2012

    first tell me it show only no signal or it donot charge and not running on electricity

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SOURCE: compaq nx6110 problem

check your laptop by another charger, so u can find the exact problem, sometime charger problem may also occur.

Note: change your charger

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Posted on Mar 12, 2010

  • 4044 Answers

SOURCE: When the ac adapter is

It a bad cell in the battery pack. That battery will die faster and faster each time until eventually it won't work at all. Replace the Battery.

Posted on May 16, 2011

SOURCE: HP Pavilion dv4-1220us cannot start. the led on

charge ur battery

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Related Questions:

1 Answer

No power, will not turn on.


For this kind of issue, please follow up the following steps to check:

1.confirm the battery and ac adapter connect the laptop normally.Maybe the bad connect lead to this problem. If there are no lights when you turn on laptop, one of possible reason is that your adapter is malfunction.

2.the second possible cause is laptop dc jack failure. If the dc jack is broken or loose, you are required to replace it or repair it.

3.Another possible reason is that there is something wrong with laptop motherboard. For this situation, it includs two kinds of possibility,a failure in an electronic circuit and BGA malfunction.

For more detailed reasons and solutions, please have a look at the following article:http://www.ifitjams.com/lappower.htm

If you verify your laptop adapter is dead and you plan to order a new one, I recommend one for you on the basis of your laptop model:

http://www.chargerbuy.com/intocircuit-hp-pavilion-dv4-ac-adapter-65w.html

http://www.chargerbuy.com/replacement-hp-pavilion-dv4-ac-adapter-19v-4-74a.html

http://www.chargerbuy.com/replacement-hp-pavilion-dv4-ac-adapter-18-5v-3-5a.html

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buy one from eBay for less than $15

http://www.ebay.com

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Maybe it's the charger or dc jack that was broken. Just test with a known working adapter connected, see if it charges, if yes, then your charger is broken, while if not, then you have to resoldered your dc power jack.
Specs of HP DV4 AC Adapter:Output: DC18.5V 3.5A
DC Connecter (Barrel) size:
Internal Diameter: 5.0mm
External Diameter: 7.4mm
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3). Your LCD is shot dead so it will need to be replaced. Current used LCD can range from $40-$50 and new ones with warranty $60-$100. HP is set up for easy LCD removal so shouldn't take more then 30mins to replace, just be careful when handling the ribbon and inverter cables.

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