Please note that there is "directional" in the installation of RD1.
If you installed RD1 at a wrong direction, not only will RD1 be damage but will also damage the
ROM on the motherboard, even to the extent of damaging the motherboard.
Damages done due to wrong installation direction or method is not within the scope of repair and
1. Locate BIOS ROM on the motherboard
BIOS ROM is about 15mmx42mm in rectangular
shape with 32 pins black IC. Also, in most
condition, there is a BIOS licensee’s sticker on the
Cannot use RD1 product if the ROM was not
installed in the socket but was soldered directly on
There is a half-moon shape
dent at the direction end of
BIOS ROM as shown in the
2. Remove the ROM
3. Installation of RD1
As shown in the drawing, use an ROM extractor to
clamp both sides of the ROM, then pull the ROM
This should be done very
carefully to avoid bending the pins of ROM. If the
pin of ROM was carelessly bent, use a pincher
and bend it lightly back to its original vertical
After taking out the ROM you can see that there a half-moon
dent at the exposed side
of ROM socket that is the same
as the half-moon dent of ROM indicating the direction.
There is a half-moon symbol on RD1 representing the direction of "key". (Try to locate
the position of C2 on the baseboard, there is a half-moon symbol beside C2. Or use
the asterisk symbol on the sticker on RD1 as the direction of key.) Install the key of
RD1 at the same direction as
the key of socket on the
motherboard. Pay attention
to both sides of 16 pins and
make sure that all the pins are
inserted in the socket.
4. Connect Switch Cable
Connect switch cable with J3 on RD1. No need to consider the direction when
connecting this cable.。
5. Installation of Original ROM
Install (insert) the ROM that was taken out in Step 2 back on RD1. Pay attention to the
half-moon mark on the ROM. Make sure that it is at the same direction (same side) as
the half-moon mark on RD1. If you cannot locate the half-moon mark on RD1, locate
C2. The half-moon mark is beside C2.
Make sure that the 16 pins at both side of ROM should be
totally inserted in the 16 pins at both side of RD1.
6. Use a metal bracket to fix the metal plate with switch
There is a metal selection switch plate at one end of switch cable. Screw the metal
plate on the bracket then screw the bracket on the computer housing or fix it directly on
the hole of any blank D-Sub9 connector.