Does anybody know where i can find the bios chip on a XPS 420 motherboard? I think its U9 but i don't know. I cant find any Service Manuals for this model. I am looking to replace this chip.
It is likely that the chip is soldered to the board, and thus only replaceable with a soldering iron.
If you can give a high-res picture of both sides of the board, I could identify the part for you. It should be a 4-16mbit SOP8 EEPROM. Usually Macronix or SST.