Great answer Larry
Larry Ng Aug 27, 2021
what a great question that is, and all time first here, I think
first off you you looked at all chip on them MOBO and not the CPU or south bridge.
you;d find it, it is usually a 6 or 8 pin SMD chip (a serial flash, EEPROM,.
surely you can just look, and find it, the makers are few.
or winbond, etc.
it is most times closest, to the huge south bride chip , not CPU nor GPU chip.
the south bridge loads it at power on time , one of its little jobs.. using 1 wire, serial.
i see an 8 pin behind the centered fan jack.
south bridge is Mobile Intel HM370 chipset
dell no tell you this, it is there design.
do you know logos of EEPROM that be first to learn so when you see that logo on 8 pins its bingo moment
near the 370 chip;
the 370 has SPI pin for flash. the data sheet at intel.com shows, all SPI pins, SPI-I/O pin is one, key pin.,
what dell used for EEPROM is not documented.
it is sold here
Compal LA-F611P. (secret name)
page 17 in the schematic it shows.
there is 2 chips, and are COLAYED. oops,
mouser.com sells both.
the first chip IS WSON package there is NO CLIPS that fit Solder balls. on the bottom, period.
this page is my serial progress. hop it teaches how to find the chip,.
free schematic here
click download bar get PDF full. for free.