I opened the back cover of Aspire R14 to replace the HD with a SSD. After I installed the new SSD and put the back cover on with all the screws, the laptop could not be turned on, regardless if I used internal battery or power supply plugged in. When the power supply is plugged in, the right LED light in front is ON with solid blue light. When the power supply is unplugged, the light turns off. Regardless of power supply connection, when I push the power button on the side, the left LED light in front blinks in blue color, nothing else happens. If I hold the power button for about 4 sec, the left LED light is turned off. It dose not affect the right LED light. I checked all the connections on the PCB and didn't find any issue. I tried to press the battery reset button for 5 sec or longer on the back. It didn't help. I also re-installed the original HD. Power still cannot be turned on. How to trouble shoot and fix it? Any help is appreciated. Thanks!