HOW TO REMOVE THE BIOS CHIP
FROM THE MOTHERBOARD
Although it seems like a simple task to remove the bios
chip from the socket, much can go wrong in this step. First verify that your
bios chip is indeed installed in a socket and not soldered directly to your
motherboard. Nearly all motherboard manufacturers install their bios chips in
sockets, however on rare occasions the chip is soldered directly to the board.
If this is the case, your bios cannot be removed and the motherboard must be
BIOS CHIP IS IN A SOCKET
The socket which contains the bios chip holds the chip in place with a strong
friction fit. Each pin (leg) of the chip is held by spring leaves, one on each
side of each pin. To remove the chip, carefully follow the instructions listed
Note that the chip has a notch on one end. This notch identifies the orientation
of the chip in the socket. Usually the socket also has a notch. When the
chip is reinstalled, the notches must align. There may also be an image silk
screened directly on the motherboard which shows the notch. DO NOT
use the writing on the chip for orientation!
2. You must remove the chip without bending or
distorting the pins. Be sure to note the orientation of the chip before it is
removed. There is a notch at one end for DIPs and a small dot on one shoulder
If you have a PLCC (small square bios chip) you may use
a PLCC extraction tool. This may be purchased from Radio Shack (276-2101). You
can also work the chip up a little at a time with a small flat blade jeweler's
screwdriver at the open corners of the socket.
The easiest way to remove a DIP is to insert a small
flat blade screw driver or pocket knife under one end of the chip. Very
carefully raise, or lever the chip end until it just begins to lift from the
socket. Be careful not to have too great an angle. Also be careful as to not
press on the motherboard or surrounding components as this may cause damage.
After one end of the chip is slightly elevated from the socket, move to the
other end and perform the same operation. Move back and forth from end to end
until the chip lifts freely from the socket. We recommend Radio Shack part #
276-2101 for both DIPs and PLCC's.
3. If you are successful, the chip pins should remain straight. If you
accidentally bend the pins, use small needlenose pliers to straighten the pins
to their normal alignment. If needed, you are now ready to determine the manufacturers
part number of your bios chip.
4. If you are sending the chip out to be reprogrammed insert the chip in a conductive
foam strip to protect it. Foam can be obtained from Radio Shack.
BadFlash.com thanks Andromeda Research Labs for permitting the use of their pictures