hi every one i have D620 laptop with this problem ... laptop boot up fine but battery show me plugged in not charging. in first screen i see message ADAPTER NOT DETERMINED i change the ac adapter with new one but not help i change battrey. change OS. and bios updated. but not help i open the laptop and the dc connector its fine connected. i change charger ic and clean board but not. help

please help me how to solve this problem.... in advance please ???

AC adapter MUST be identified in BIOS (65/90/130 Watt)

Check all from U216 MEC5004 (54) PS_ID to PS_ID_IN - 1-Wire bus..

thanks for fast. answer i measure the pin 54 in sio this pin have voltage about 4v PS_ID. and in PQ2 I HAVE 3.80V. PS_ID_IN how to check else?

please help me