If the machine is 900X or 900K, the OSTs of the two machines are played with the data on the hard disk, and MIDI is played with the data on the DVD ROM. If a hard disk is installed but a DVD or VCD is not inserted, it will cause the OST OK MIDI songs to have the Company’s logo, or the DVD standby screen to have no background footage. This may also be caused if a hard disk is connected but the CD drive is not.
