no power on no sound nothing

The acer aspire 5100 is not starting with the ac adapter I have no battery . the last time it boot but after sometimes it shutdown after that no indicator no fan moving no display . the ram is checked it worked well the processor is good and also the fan and extention usb board is also good i used ubuntu 20.04 lts and debian 10 ram amount 2.5gb no hdd used san disk cruiser blade 2.0 usb 2 32gb processr amd turion tl-50