You need a new 2.5" SATA drive -- it might be a good time to consider replacing the failed hard drive with a solid state drive.  
Dear forum / Dell support Please help. I have just run a diagnostic on my Inspiron n5010  and have the following error message: Hard Drive Failed during diagnostic. Error Code 2000-0142 And disk read error. Press ctrl+alt+delete for restart 
Hard Drive Failed during diagnostic. Error Code 2000-0142