After confirming the installation with the memory device that is suitable for your system, please follow the steps given below:
a. Shut down the computer and unplug the power plug.
b. Re-insert the memory device with the maximum capacity to the 1st socket, and then re-insert the memory device to with the smaller capacity in a decreasing order. Ensure that the memory module has been installed correctly, and then align each DIMM with the connector slot by aligning the notch in the DIMM with the key in the connector. Then, steadily and firmly push the memory device into the slot until it is locked to its position.
c. Make sure that all cables in the computer are connected correctly. Probably, the required power connector is not well-connected to the motherboard, or any cables that connect to the hard disk have been disconnected by accident.
d. After the recommended memory device is installed correctly, but the laptop won’t reboot or identify the memory device, it may be necessary to download the latest BIOS from the laptop manufacturer’s website.