Q)It Shows ‘IODD 2531’ or ‘IODD 2541’ only.

 

A)Check following steps.

In case hardware problem.

1. Plug USB cable to rear port. (due to low power)
2. Change USB cable.
3. Reboot PC.
4. Change HDD. ( due to bad HDD).
5. Connect direct to USB port. not using USB HUB.
6. Connect another PC.

In case software problem.

Apply step 1 or next steps in the following order.
1. Press and hold the Jog Switch, and connect USB and release the switch.
2. Check Drive.
3. Make new _ISO folder (after rename old _ISO to other)
4. Format HDD
5. Upgrade firmware to the latest (currently 1288).