AhmadZ
Hello there.
Could you please send us a picture of SN code(two lines) at the bottom of machine ?
Please repeatedly press delete key as soon as you turn on the PC, go to BIOS. Please send us a picture of the Main page, we will check if you need to update the BIOS and solve the problem.
Don’t worry, this power supply is produced by us, the power supply is marked 100-120V just to meet the export certification, in fact, this power supply can be used for 100-240V voltage.
Have a nice day~