Leezone,
You are dealing with a Ketron KB not a Toshiba PC running windows, the Ketron doesn't know whats connected to the USB port when it boots, no plug and play with a Ketron. If the HD was mounted externally just under the unit, not lashed on with tape, in a proper housing with the ribbon off the MB into the HD it would take you two mins to change the drive if ot stopped working. It did look at making a kit up once over, but the drive appear to be OK now. It just that the ketron won't run without the HD.
Don't give up the day job Leezone, where the hell does the Genious bit come from not my side of the family....LOL.
Regards
Tony
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Tyros 4/Pair SR 350/ PC with a i8 intel chip, XENYX 802, Ford Focus 2 litre/Tascam DR07/Brother printer/Designjet 500/ our Doris/5 Grandchildren/ white boxers short Kymart shipped over and Typhoo Tea Earl Grey