July 30, 2012
Yeah, I know ML got released but it isn’t very interesting…
So, back to topic, sometimes it happens so you flash a videocard and after reboot the system doesnt see it at all, usualy happens with nvidia cards.
What to do ?
need to erase flash rom chip, but how, if one is not soldering guru and has no spi programmer ?
well, just need to prevent videocard from reading flash rom chip and here is how:
1) hardest part, find the spi rom chip, its 8-pin chip, usualy looks similar to this one, color doesnt matter
see the dot on it, its pin #1
there is few chips that looks similar, but only one is flash spi rom chip, be carefull
short pin 4 and pin 5,omni suggested it’s better to short pins 1 and 4, better to do it with some thin wire, and make sure you didnt short anything else, also make sure you can unshort it when the card is running and dont short anything else doing so.
this trick prevents videocard from sending any command to flash rom chip, and so it cant read content of rom chip
3) now start the computer(obviously you will need the second card to do this), now the card will be visible, with 0000 as subsystem devid and vendor id,
make sure system and flashing app see the card fine
4) now very carefully, while the system is running, cut the wire you used to short 1 and 4 pins
5) flash the card (in case of nvflash use options -5 -6)
6) after flashing is done, quickly switch off computer, remove the card, remove all wires you used to short pins