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some interesting items...
my motherboard, acer has 2 stickers with part numbers between pocessor and dimm1 "M/B MBV340900170601247EK01" (assume acer serial or part number) and "04EG70603011 PC965M03A1-Q-8Ks2H" (assume manufacturer part number)
this has the pheonix bios sticker covering an empty/unused PLCC pinout. (mentioned above before)
there is a 2-wire (Bk+Rd) front panel-like switch inside, with a label "Recovery Switch". this is not plugged into anything at all on the mainboard, and the switch side is just tucked in with the rest of the front panel/USB wires inside the case.
I have found what I think is the BIOS chip(near the aux sys fan pwr pin) and has an adjacent CMOS clear jumper.
nearest to the CMOS clear is a 2-pin header labelled OBR
Also nearby, directly below DIMM3, but still close to the BIOS items is a 2-pin header labelled INTR1.
Perhaps some combination of attaching the 'recovery' swith to one of the headers will activate boot block on bios or allow floppy reflash?