HP 6735S LED Light Flashing 3 Times

hello
i have a HP 6735s with 4gb ram and the caps lock light is flashing 3 times have read on hp and its a memory issue i have tried the sticks of memory one at a time and both together in different memory slots and still the same led flashing 3 times, i have tried the memory in another laptop and they work fine so its not the memory and have tried brand new memory in the hp 6735s laptop and still the same problem so i think it maybe a motherboard fault can anyone help please
Thanks Brent 

I agree with you then brent_smith.  It would seem that the problem lies with the ports and would likely need to be replaced.  
Here is a link to your notebook's Maintenance and Service Guide.  It covers the disassembly of the notebook as well as how to replace the parts.  This website has the various part number you'll need.  You should be able to order the parts from HP Parts Surfer.
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