[TriLUG] hp laptop power problem

[John Mitchell]

I would go for the bad power jack on the motherboard (first) then a bad
internal power supply.
The pain is either fix requires complete dis-assembly of the LT. The service
manual is available (I own a Pavilion dv4-1220us) if you dig
arround HP's site long enough.
   Is the power brick the original HP one? (I have a Targus unit that they
swear works on my HP but it doesn't). I also have another HP power brick
that requires you to push a button on the brick to make it start charging -
even though the input power LED on the LT is On!
john mitchell

On Thu, Aug 4, 2011 at 5:58 PM, jason tower <jtower at cerient.net> wrote:

> i don't deal with these very often, hoping someone knows more about them
> than i do.  got a hp pavillion dv4 laptop that seems to have a power
> problem.  plugged in w/ battery installed the power led blinks but laptop
> won't boot (comes on a second or two then shuts down again). battery
> removed, no power led at all, and won't power on whatsoever. multimeter says
> power cord is putting out 20v.
>
> bad power brick?  internal power supply problem?  supposedly the battery
> has been replaced with no change.
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