I cant turn on my HP520 notebook pc. when i press the power button, it blinks once, and the charging light blinks for 9times(orange light, the 8th times was green light) i tried to remove the battery and adapter, and leave it for 15 mins, even tried to press the power button for 15 secs. then i plug in the adapter and press the power button, nothing happen. then i tried to put on the battery, i press the power button, it still the same. i need some help on these please.

One more things before assuming it is the charger, check out the charging outlet on the laptop to see if the pin is bad. If it is bad, damaged, or really loose when you plug in the adapter, then it could be this that is causing the battery not to charge and no power to the laptop. One more things before assuming it is the charger, check out the charging outlet on the laptop to see if the pin is bad. If it is bad, damaged, or really loose when you plug in the adapter, then it could be this that is causing the battery not to charge and no power to the laptop.

but before i turn my pc off, i'm sure that the battery was still in 90% .. should be enough to power up my pc system. but before i turn my pc off, i'm sure that the battery was still in 90% .. should be enough to power up my pc system.

another thing, i don't think it's the adapter problem, as if i plugged in the adapter and battery, both, it only shows green light. it blinks like what i said when i unplugged the adapter but still with battery. nothing happens when i take off the battery, but with the adapter plugged another thing, i don't think it's the adapter problem, as if i plugged in the adapter and battery, both, it only shows green light. it blinks like what i said when i unplugged the adapter but still with battery. nothing happens when i take off the battery, but with the adapter plugged

At this point, I am not sure then if you said you have 90% left, The only thing that questions me is you mentioning that when you have the adapter pluged in and the battery out.... It doesn't turn on at all, and when you plugged the battery back in, and taken the adapter out, it would start and blink and die. This conclude that the laptop is not getting power and thus the promblem is either the battery have a low charge, powersupply charger damage, or the power jack is damaged. If it was the laptop, eitherway if you have the power supply plugged in or not, it would do the same thing. I am still 90 percent sure it is the battery that gone depleted and the charger is damaged and didn't charge the battery. Sometime with battery after a while without use, it will still drain itself or if you have it in sleep mode. Other then this, I'm not sure I can be a big help. Thanks At this point, I am not sure then if you said you have 90% left, The only thing that questions me is you mentioning that when you have the adapter pluged in and the battery out.... It doesn't turn on at all, and when you plugged the battery back in, and taken the adapter out, it would start and blink and die. This conclude that the laptop is not getting power and thus the promblem is either the battery have a low charge, powersupply charger damage, or the power jack is damaged. If it was the laptop, eitherway if you have the power supply plugged in or not, it would do the same thing. I am still 90 percent sure it is the battery that gone depleted and the charger is damaged and didn't charge the battery. Sometime with battery after a while without use, it will still drain itself or if you have it in sleep mode. Other then this, I'm not sure I can be a big help. Thanks

oh. okay. thanks. i will try to let it charge or try to replace the adapter to check. thank you. oh. okay. thanks. i will try to let it charge or try to replace the adapter to check. thank you.