If no more warranty, you can try opening it. That's the only way...

for me, i think i prefer wait until the warranty is all most dead den only go for RMA. well if u go for RMA nw, later if yr monitor suddenly jz gone off how?
sry if my question smell noob..

black dot? they will check when u return to them...so try ur luck

Nah, I dont think they will questioned me with my descripition, you wont expect an ant to be inside of your monitor right?

If the monitor assemble in proper way, I think the ant shouldnt manage to be there at very first place?

Btw, the called me just now, tomorrow they come change new one

True that. It doesn't make sense that someone would want an ant there in the first place.

Dell's at fault and they should honor their warranty policies.

Once familiar with dis-assembling LCD/LED monitors, it can be quite easy although not for the faint hearted (speaking from experience here). There may be warranty seals on the sides and if these are broken then warranty may be void.

That's good news.

You can say its looks like a "manufacturing defect" if questioned.