You may want to see if the fall dislodged the antenna from the wireless adapter -- or the card from its socket.  As for the rest, if replacing the battery didn't solve the issue, the clock chip itself is bad (or the battery connector has detached from the system board).  Any repair of those will likely require 50% or more of what the system initially cost -- and may not be a viable plan from an economic standpoint.  
Hello.  I closed my laptop computer and accidentally dropped it on the ground. I had few scratches on the back. When I powered it on, it noticed some problems. 1. The white glowing power on light doesn't show. 2. It makes two, three or five beep sounds. I'm not sure if those are errors on the hardware. 3. It cannot connect to the Internet. I can either turn on or turn off airplane mode. I don't know if there's something wrong with the Wi-Fi card. I opened the command prompt by typing cmd. I typed ipconfig and it doesn't show anything about the ethernet adapter or my wifi router information. I tried to disassembly my laptop and thought taking the cmos battery out and putting it back in would fix the problem. It made the same three problems again that I just mentioned before. Is there anyone who knows how to fix this problem?  
I have some issues with my Dell Inspiron 3147 2 in 1 laptop computer.