I bought note book ASUS Model A42J Serial No. B3N0AS03213909D about 1 month ago. And I found 2 problems 1. Battery can't keep the power. 2. Speaker are noisy. I sent my note book to ASUS service shop ( Chiangmai Branch) after 1 week the service shop informed me ... Main broad damaged and wait for spare part and repair 1- 2 weeks. Which, I think in this case the ASUS THAILAND must be change the new one for me because main board is the important part of note book. So, I hope the management of ASUS THAILAND would'l to understand feel of customer because I was selected ASUS note book already.