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HP Recommended
Hp Elitebook 840 g1
Microsoft Windows 10 (64-bit)

My computer Starts until logo screen then power button blinks once and the computer goes off 

or

sometimes it turns on until windows loads and it asks for my password then suddently goes to sleep mode  , 

so when i press the power button it gets me to the logon screen and then sleeps 

battery is pluged in and when the ac is pluged in the battery led shows that its fully charged i try to turn on on battery only the same issues as in ac pluged or ac plugged without battery inserted 

and sometimes it just starts that easy and works just fine while ac and battery both plugged and suddently the battery leds start blinking like 5 times white and one time orange  then a last time white 

i don’t understand the issue here please any help would be appreciated 

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