Sorry for late reply. I was little busy during weekend and havent had a chance to work on the printer.
But I came back home tonight after work and I checked extruder drive and wiped filament before testing.
I tried printing a small object with 240C, 0.2mm, and 40mm/s but no luck.
So I just heated up the nozzle to 240 just to see if I can extrude PLA.
Unfortunately I couldnt extrude any but the retraction was working fine.
And like gr5 told me to, I set the nozzle temp to 105, soak water on q-tip, and touched nozzle but no sizzling.
But at 240 temp, water sizzled though.
Now I am pretty stuck and dont know what I am going to do.
Please help. Thank you