Lenovo g710 M/N 20252 power problems

[xenonsmurf]

Hello all,
Seeking some advices on my Lenovo g710 model 20252 I had an issue with the power adapter and the laptop decided it wouldn’t charge any more. After the charging light came on and wouldn’t go off.

I’ve changed the dc jack and bought a new adapter.

The laptop wont power on and the battery will not charge.

With just the adapter plugged in no power

Adapter + battery power light on but wont boot up and no charge to battery / no charge light

I’ve tried the holding power button in 10x then once for a 60sec with and without the battery. Also I’ve tried it without anything connected to the motherboard (dvd drive. Cpu. screen etc). Reconnected everything and tried to boot up and nothing happens

With a multimeter I’ve checked a few points on the board but I’ve no real idea what to check for.
I read 19.4v up until 2 chips near the battery and they read 19.4v in 1.4v out.
the motherboard is a Lenovo BAMBI2 MB W8S DIS HM86 2G (P/N 90004373)

any help and advices is appreciated

thanks

 

[xenonsmurf]

forgot to say when the battery had charge and both adapter and battery conected it would boot for about 20sec then shutdown

 

[Arrow_]

there is no problem about the adapter.