Dell SD solved!!

The Dell technician came to my house and fixed the faulty card reader, which previously can read xD card but not sD card.

To my surprise, for just the sD faulty, I had to change the whole motherboard, hence I got a new motherboard now, LoL~ Plus now its still in warranty, so its free!! Wahahahaha~

Though the hissing sound still persists, but not as loud as using the old motherboard I think.

So for people who are searching for sD card reader not functioning, call a Dell technician to fix it!