Hello, I have a dell latitude e6430. it works fine on either ac or battery but not both. attempting to connect ac when battery is attached, shutdown the laptop and vise versa.
sorry youre wrong, the AC pack is 19vdc (unregulated ) so 19.5 to 20.5 is par, ok
first off learn that the power pack is 2 things,
one its power, if 19vdc is on the 2 pins, at all times plugged into the wall AC jack and the PC at the same time the power is ok
now feature, #1
the pack also has this other odd feature.(power fail logic)
(and can fail and do just what you see)
first off the pack needs to be 65watts or 100 and for HP computers
not some universal thing, off fleabay. (for sure with a voltage switch on the pack is NO GOOD)( I cant see yours so.... yah,...)
that is because of the power down logic wire on the wrong packs is wrong. or missing.
the Pack AC if you unplug it to from the wall signals the PC
in an early fashion to switch to battery power. so there is no loss of power, for even an instant.,
to prove and learn this magic feature, unplugging the DC cable first on a LAPTOP will make it crash, on many laptops.
this PC is now 6 years old, not too old but sure is old in the world of batteries.
The causes are ( cheap to expensive) easy no? see 5 first.sorry
1: the main huge battery is bad. this is 99% failure rated device,
batteries fail easy, and often so why not own 2 like me , so if on say vacation im not stuck trying to find a battery in a panic
spend $15 now and not $100 in a panic at say Tahiti.
learn that that battery can short, and if it does (fire can happen)
but if it shorts it will overload the charge chip and its logic goes nuts.
so that is way both battery in the PC are always suspected.
it runs AC, just do that until a new set of batteries are found,
15 for big, $2 for coin.( 50% chance on coin bad)
2: the power pack is bad, as i told you above. the power logic signals are dead. but DC side ok. or WRONG PACK.
3: the mother board power jack is bad, on mine it is $5 cable that goes inside PC, laptop , but others its a hard soldered jack to the MOBO if bad is not easy to fix. with that. I have some very expensive tools to fix the hard ones and is still not easy.
we heat gun it first, then clean the holes, (hard) and put on a new jack easy if one can get this far....
4: last is the charge chip on the mother board is bad so mobo is bad and $100 up for used good one.
5: Ill add this too, as all PC over 7 years old the coin cell goes bad.
all do, this, replace it now, for $2, if the voltage from this cell drops below 2.9v, much the BIOS goes nuts. and any thing can happen with NUTS. (the NVRAM scrambles and causes endless bad symptoms and even a dead PC, or other logic failures and for sure lost of time of day or Mm/dd/yyyy, lost.
if that is too hard here is a guess list.
1: new coin,
2: new big battery
3: new correct wattage HP power pack.
4: new mobo ($$$$$)
$2, $15, $15, $100-150