Hp 4520s Not powering up white led blinking

[markopolo]

Hi everyone!

I have a problem the HP 4520s that is not powering up.
I have measured the regulator voltages and they are ok 3,3V and 5V
Then I have checked the charging chip and everything was ok except the acdetec there should be at least 2.7 V for the chip to detect the main power but there is 0. Then I have checked the resistors capacitors and transistors where the acdetect comes from and all seems to be ok.
If someone had this problem any suggestion would be apreciated.

The Main board is H9265-1

[Ramee]

Re: Hp 4520s Not powering up white led blinking

Flash it

[smali]

Re: Hp 4520s Not powering up white led blinking

check the adopter watts may be low and battery may be fully discharge.

[claudyu07]

Re: Hp 4520s Not powering up white led blinking

How many times it's flashing?
Hp have error codes
Check this : http://h20564.www2.hp.com/hpsc/doc/p...rComputerBeeps

[masud]

Re: Hp 4520s Not powering up white led blinking

press and hold the power button without battery and charger for 10 seconds and then try.

[mesersmith]

Re: Hp 4520s Not powering up white led blinking

Do you have the original HP charger?

[markopolo]

Re: Hp 4520s Not powering up white led blinking

Yes I have tried all the suggestions but nothing helped. Except for flashing I didn't flash it yet. Does anybody have a bios dump? And it is flashing instantly.

[gcomputers]

Re: Hp 4520s Not powering up white led blinking

try this, but maybe ati chip problem???