Please try following steps, one step at a time to tackle
make sure that new module is pushed all the way down in to the socket. If
memory module is defective and is seated properly then your computer will
either beep or will give you an error code. This kind of problem is normally
caused by improperly seated module. Please try again and make sure to push
it all the way down and system power should be off during installation.
turn off the power to your system and remove Kahlon module and use pencil
eraser to clean memory module gold contacts and make sure that memory socket
is also dust free and reseat the module.
turn off the power to your system and try installing Kahlon module in a
different socket if more than one socket is available.
turn off the power to your system and try installing Kahlon module alone in
check Kahlon part number and make sure that you have ordered correct module
for you computer.