Dump/Read all the chips according the previous notes and tips, install CH341A soft and drivers, probably didnt come none with the package, correctly use the adapters on the 3,3 and 1,8v.
AC adapter off , with CMOS battery on or off, always try readings with both off for starting.
The tricky part here is making a good connection with the clip to the SPIs and an up to date reading software with the referenced Chip IDs on the database identification of the soft.
Readings content should not present FF data on the whole reading.
DO NOT rush yourself, read and learn… you dont need a burned chip or damage motherboard.