Hi inverno4661,

Thank you for writing to us. Please check if the ac adapter is detected in BIOS follow the steps below.

Shut down the computer and tap F2 during the startup > default BIOS page will be ‘Main’ in that page check the Ac adapter type is 65W/90W/130W. If the adapter is detected in BIOS, Kindly update the BIOS using the link bellow.

http://dell.to/13EVLww

In this link punch in the system service tag or express service code and select the appropriate operating system, under the BIOS category select the latest BIOS and install it.

Connect the Ac Adapter before updating the BIOS and do not use the system until it restarts after the update.

Please let me know if this helps.

sorry for the very late reply.

it took me some time to understand where you wanted me to look on the boot menu....

but i did find it.

it shows the ac power is 65W.

i tried updating bios but it gave me an error:

"Cann't flash to the same Bios version. Press OK to exit. "

yes it actually says "Cann't"

the service tag of the laptop is: <ADMIN NOTE: Service tag removed per privacy policy>

Hi inverno4661,

Please send me the system service tag or express service code through this private chat, I will see what best can be done.

Click on my username select start conversation and send me the details. 

Please refer to the link below where to locate the service tag or express service code.

http://dell.to/162b3za