Technical Support Surface Pro 1724 if it turn off when power supply is disconnected X910540-007

[user61596]

I get a Surface Pro 4, with broken LCD, I just changed LCD and get this problem.
Surface Pro 1724 work only with Charger
Board: X910540-007
when Battery connected, and charger disconnected
PC5521=3,3V
PD5501 pin 1 get 7,81V pin 2 get 7,49V
PD5506 pin 2 get 0V pin 1 get 7,49V
when Battery and charger connected
PD5501 pin 1 get 8,39V pin 2 get 11,67V
PD5506 pin 2 get 0V pin 1 get 77,67V

The Battery will charged without any Problem,40%,50%,60%,70%,80%. but when I disconnect charger, its turning off.
I get a new battery, nothing has changed.
The Surface has worked bevor, with broken screen.
I try to turn on without LCD, no turning on.
Board is clean, no place where I see burned.

 

[user61596]

any one ?

 

[Ahmad Safari]

Check detect battery pin .this pin when conected battry 3 v :> 0 v

 

[user61596]

Check detect battery pin .this pin when conected battry 3 v :> 0 v

it´s 0V.
Bettery connected.
I measured it on L7004 (pin2)

 

[user61596]

any one, can Help me?

 

[user61596]

with my BIOS it´s turning on, but showing Invalid screen

 

[user61596]

Überprüfen Sie, ob der Batteriestift erkannt wird. Dieser Stift ist bei angeschlossener Batterie 3 V:> 0 V

I have 0V when Battery connected

 

[Hosein Asadolahi]

I have 0V when Battery connected

reprogram bios and test