Booting

For the Eppendorf Mastercycler Nexus Gradient, try a complete power reset by switching it OFF, unplugging the power cable for 10–15 minutes, and reconnecting it directly to a stable power outlet. Since the unit has been unused for a long time and remains stuck on the Eppendorf logo, the issue may involve a startup failure, internal power supply, or control-board problem. If it still does not progress, avoid repeated power cycling or opening the instrument, and contact Eppendorf service for diagnostic assistance. I recommend recording how long the logo remains displayed and whether any startup sounds or error messages appear, as this will help identify the fault.