Hello,
I successfully flashed this motherboard with a Winbond flash chip "W39V080FA (1024 kB, FWH)" which is currently tagged as UNTESTED for ERASE and WRITE. http://h20564.www2.hp.com/hpsc/swd/public/readIndex?sp4ts.oid=3353051
I flashed from BIOS version 1.08 to 1.14 (the last one). Note that the BIOS included some DMI data (SKU number, Serial number, UUID, etc.) which have been deleted during the operation. See dmidecode_before/after log files attached for more information.
Here are the logs.
Regards.
-- Benjamin