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I have a dv4017ap laptop ... was working properly yesterday my daughter closed the laptop without shutting down and now the laptop is completely dead

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  • simon_rob560 Nov 19, 2009

    i have a dv4017ap .further to previous emails i was using a car charger to keep the machine powered up
    i changed the battery,the power supply,and no change ...the machine is totally dead
    i put the car charger back on it and it blew a fuse in the fitting
    machine is still dead
    any ideas??

  • simon_rob560 Nov 19, 2009

    i have changed the power lesd and the battery .....

    i have tried to power up the machine with no battery and different lead

    i dont know whether or not you got my last post about thre machine running on a car charger yesterday..was working perfectly and charging normally for over 8 hrs

    i put the same charger in today and blew a fuse in the car charger

    it charges my other machine perfectly after changing the fuse

    even put my battery into another computer it worked perfectly



    something has fried in the puter as it blew a fuse ....is it too much to hope its the pin where the power supply goes in????

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  • Computers & ... Master
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Hi, I'm Steve, Can I get you to try something for me, please remove the battery pack, and power the unit just from the wall adapter without any battery installed.

I have seen battery's give out their last breath, and when some do they develop a short circuit not only effecting battery but all power trying to get to machine.

If this doesn't help please confirm a few of the following and we shall dive deeper

- Is there a light on the adapter itself to indicate power?

- Do we get any lights on laptop, or lke a display flash on power ups?

Hope it is a simple as a dearly departed battery, if we have no power at laptop then first step really I do as a teco is confirm power at the power adaptors output with a multi meter, but some have a light on the power supply so you can tell it is working as these often fail too

If all of the above and you have double checked the wall outlet several times, and the adapters working and the battery not dead, then at best it is the connector that goes from the adapter into the lappy, it cops abuse over time and breaks internally.....and if not then it is the motherboard, and that pretty much is the end of the story.

But if we have light (any light) there is hope.....;)

Hope this helps

Cheers

Steve

Posted on Nov 19, 2009

  • Soulvisitor
    Soulvisitor Nov 19, 2009

    Please confirm you have run it without any battery pack installed, from any known source, otherwise it is the same as my own.... burned on the power circuitry, it may go direct short on main P.C.B or open, but if the adaptor works and battery is not installed and plug is good, then it is a right off with any lappy, main boards only get changed by warrany customers or fools with too much money....., afraid if you open it up you will find a section of burned components, all main board, all not ecomomical to repair...no fuses to play with, no componts to change, welcome to our modern world... all compact intergrated one board chuck away babys...



    Might have to get a second hand one, for quite cheap, no point in new ones really, people are always just upgrading and discarding last years quite fine ones, governments do rollouts of the new and all the old go cheap at auction with licenced software in most cases,... greys online, I have found works for me, then you can just switch you hard drive, go threw about 2000 window driver updates ;), and all will be as good as old.

  • Soulvisitor
    Soulvisitor Nov 19, 2009

    A very very few of the lappys come into the workshop dead and with good power supply and it has turned out to be a resolder of the power socket pins, but there few and normally seem to be HP's, and it has sometimes worked although time costs, renders it not worth chasing the faint hopes of customers, the boards are multilayer, if it is the socket then you should be able to get light with a wiggle, but for it blow fuses, that's a short and not a disconnected solder joint..direct short...compontent burn and melt...



    .....sockets.dry joints tend to cause open circuit ie disconnection, to get a short we have a bridge of electricity, does not happen from breaks normally. If we had it even on a wiggle, one is going to have to strip it, spend 2-3 hrs, and try to reolder and reassemble.



    There not a brease, and break very easy, many tabs and connectors and cables, they are not designed with much regard for disassembly, although it is possible, keep note of long and short screws placement to prevent inflicting more shorts, be ultra carefull on connectors to ensure to release any clasp prior to pull the correct direction without too much gusto.. , Pull off the little covers for the Hard drive, Ram, inside you will see marked screws K or an arrow, these release keyboard, then remove keyboard, without bustin the clips, then more screws, disconnect monitor cable, remove hinges, remove screen...remove cover screws, to release top shell from bottom, remove main board from base to get to underside...still with me?





    Anyway before this stage you know it is not supply, so your option is, take a look....there is always hope if one looks, but from here without looking, hearing I have no lights ever, ensured supply, no shorted battery pack, Mister Wiggle wont help, then I know it main board, they don't like being soldered, but there is certainly no harm in removing all screws, your going to need to strip it, to get to bottom soldered side of suspected power inlet connector which is soldered directly to main-board, try you luck, there is nothing to lose but time and Patience.







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Remove battery, press and hold power button for 3 seconds, wait 5 more minutes, put battery back in and turn it back on.

Posted on Nov 19, 2009

  • 1 more comment 
  • Nate Stansfield
    Nate Stansfield Nov 19, 2009

    Internal power supply or motherboard is shot. I would test internal power supply first with a voltmeter. You can test wires from power supply to motherboard. If there is no power, then supply is bad, if there is power and laptop does not boot up, then either the motherboard is fried or the internal memory chips could also be bad.

  • Nate Stansfield
    Nate Stansfield Nov 19, 2009

    Other possibilies could be faulty ribbon cable from screen to motherboard could be pinched, Memory chips could be faulty, or internal power supply could be faulty. You can test power supply to motherboard for power with a voltmeter where they connect.
    Last possible solution would be faulty motherboard.


  • Nate Stansfield
    Nate Stansfield Nov 19, 2009

    You can check the pin with an ohmmeter. Put one probe on pin and other probe on the opposite end to see if there is contrinuity. Capacitor's also tend to burn out. They usually swell up or get burn spots on circuit board. You can also test any capacitor on the motherboard with an ohmmeter as well. 25-30 ohms is the norm for capacitors.
    The pin or wiring could be fault or shorted out.
    You can also try removing one memory stick at a time and see if that helps any. Faulty memory chips are common and cause pc not to power on.


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