[AH530] Cannot get it boot, probably HDD error

[Enrico]

The notebook doesn't boot, neither from the HDD (Windows), neither from optical drive or USB flash drive (Windows 7 DVD or Ubuntu). It just hangs on a black screen with blinking cursor. No strange noises or clicks from the PC. Memtest passed correctly.
Testing with DIFS I get this error:
DIFS system code: 7EXW-XK7Z-3HSGC Serial: YL9Q372252

I'm pretty sure the problem should be the HDD, but I'd like to be sure before buying a new one. Can anyone help me interpreting the code?
Thank you in advance.

[sabrex]

HI
DIFS-Code: 7EXW-XK7Z-3HSGC
ECS Symptom-Code: H3X Location: First hard disk Error description: Read Test failed
According to your serial number YL9Q372252 it has warranty until 12/02/2014 and you should contact your local warranty desk they may be able to send you a hard disk (ask for CRU) or repair it via Collect & Return Service