HP Elitebook 8440p charging light blinking not booting

[hawiie]

Yesterday morning I am using my laptop then in the afternoon I tried to open but its not booting the charger lught is blinking. I tried deattch the battery and discharge it by pressing the power button then attach the charger. Works but it boot about a minute then its shutdown. I also tried resitting the Memory and tried to discharge again. But same happens.

I Tried also this

Battery out, discharge, battery in, power on
Battery out, discharge, attach ac power, power on
Battery out, ressiting memory, discharge, battery in, power on.
Battery out, resitting Memory, discharge, Ac power, power on
Battery out , resitting memory, detach HDD, discharge, attach HDD, AC power, power on

Sometimes it boot for a minute and it shutdown.

[max009]

HI how is the Fan status? is it runing too fast or it is normal.

[hawiie]

The fan is running low when it turns on
But when the charging light is blinking it run so fast

[max009]

Hallo 

this problem can be also from BIOS. try this 

http://support.hp.com/us-en/document/c02693833

[hawiie]

I just update my BIOS a week before this happens
Should I downgrade my BIOS?

[max009]

you can not downgrade the biso what you can do try to flash the BIOS this will maybe work

[hawiie]

I will try ill give you feedback

[hawiie]

Here is a Video link of my problem
https://youtu.be/RdmWiWZOZmI

[max009]

did u try with different RAM

[hawiie]

even without RAM charging light is blinking