Check the HDD's status, if you can see the HDD's information, try to format it.
If your models are:
DT41Y/DT61Y/DT81Y/DN41R/DN61R/DN81R/DT41GB/DT81GB/DT61GB/DW41JD/DW81KD/DW61LD/DT81DP/N48PI/N44PI/N46PI/N44PAM/N48PAW/N46PCK/N88PCH/S500/S300/FC200/NCK800/H800/H500
Please go to Menu--HDD--General to check its status. It should be "Normal". Click "Init" button to format the HDD for the first use.

If your models are:
NW41V/N441H/N441K/N28WEB/N441B/N441D/N441L/N44PAN/N44PAJ/N34WDB/N34WDD/N44WEB/N44WED/N44WEC/NW41V/N44WBD/N48WHP/N48WHE
Please go to System setup--General Setup to check its status. It should be "Formatted". Click "Format" to format the HDD for the first use.
