HP G42 458TU Battery Drain

[sabareeshchambayil]

My hp g42 458tu laptop is always in powered condition( i mean its shutting own ,but dvd drive harddisk etc are working) . If I kept battery in laptop full charged it will be drained with in 1 day and its a new battery.

At first I thought it would be related to windows 10 ,so I checked removing harddisk and same thing happened.

So I checked by removing battery ,harddisk and plugged adapter and pressed DVD drive and it's working without pressing power button, and display color is changing to dark and white(like flikering without back light)

I am ready to repair this myself (I mean chip level)

I have all the accessories and tools for repair and I disassembled laptop but no components seem to be visibly damaged.
i Dont know where to start.

Board ID is DAAX1JMB8C0 REV:C

i got the schematic for this model by a google search

Any help will be greatly appreciated.

[coromonadalix]

Are you sure its totally shutting down  or its the sleep / hibernate ....... in the power plan management check the settings for the power button, i've seen tons of time the power button settled to sleep / hibernate instead of a complete power down ... killed lots of batteries

Run :  controle.exe (classic control panel) / power options / select your plans settings / and go  to the change xxx settings