Hi dang ms thang,

Error code 2000-0142, indicates failing/failed hard drive and it needs replacement. Please click on the link below to check the warranty of the system. In case the system is under warranty, send me a private message with the system service tag to assist you further.

http://dell.to/Mbe3zg

Please contact the Out of warranty department If the system is not under warranty, the number is 800-288-4410 if you are US region, for UK region the number is 844-338-1000 and for Canada the number is 1-800-847-4096. If you belong to a different region, let me know the region you belong to give you the contact information.