I forgot to mention one other item i think is very important. when you erase the chip and unplug power source, make sure you unplug the rt809h from the usb port. the wires from the rt809h will supply voltage to the JTAG connections and potentially keep the chip alive i think. to be sure after erase just unplug it.

I am posting my experiences here to help the next person who may find this not so easy.

I have a rt 809h programmer that i intended to use to remove the sv password and bios password from a lenovo T490s laptop 20NY-sv3n00. this is a Gen 8 laptop i5 processor.

in the rt809h software you [U][I][B]MUST[/B][/I][/U] select MEC1633_256K (do [U][I][B]not[/B][/I][/U] select MEC1633#ISP) for your initial read out.

if you select the wrong one and read the file out and erase the chip you will not have the complete file and will be unable to re flash the chip. it will...