Laptop will not charge/run on AC, HELP.

cncrim

New Member
I have HP DV4 and lately my laptop wont charge/run on AC at all. Yes, I do know it's not the AC charge and the battery is still good. So any ideas?
 
If you are absolutely certain it is not your brick-- even if the light on the side of the power port is lit, there could still be a problem with your brick cable-- then you have a bad power supply module in the laptop itself.

Are you handy with tools?
 
One suggestion you can boil a battery and burn it out.
Mostly its plug in and charging too long. Or longer than needed.
You can not leave in and plugged in 24hrs a days.
just my thought. read the instructions then you will know.
Is a smart battery?
If not its likely the battery.
 
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I accidently left my laptop in my trunk over night - then the laptop battery went caputz! then I kept charging the sucker --- 4 days later, it was back to normal! You ever tried to keep charging it regardless of using it? I'd try that method. Batteries are a mess sometimes!
 
first off, get a multimeter

set it to ~20 volts. your charger should either be a 19 v 4.74a or a 18.5v 3.5a, so you need to set it to 20 volts.

put positive pin against the inner wall of your hp charger. negative on the outer wall. you should get a readout, roughly .3 volts higher than the charger is rated for. if not, if it jumps around alot (and you are sure you are holding it steady) or if its zero, your charger is dead, or the 3 prong power cord going to it is bad. those actually go bad alot, i see about 4 bad a day in my store.

next, if the power supply gave out proper voltage, plug it into the laptop. take your battery out, and now you are going to test the voltage on the pins that charge the battery. the first one, all the way left, is usually a negative. you could use that as a ground, or just one of the base or hinge screws on the bottom of the laptop. holding the black wire to a ground, use the red to test the rest of the pins. you should have a few at roughly 3 volts. if you have absolutely no juice going through, order yourself a new dc jack. they are roughly 15 bucks on ebay

solved :)

btw, im inebriated and used the word "roughly" alot in that...
 
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