What the thread found

• A loose ribbon cable inside the Preston HU3 unit can prevent the display from turning on when powered.
• Reseating the ribbon cable by pushing it firmly into its connector typically resolves the screen power issue.
• Checking all other internal connectors while addressing the ribbon cable issue is recommended to prevent similar problems.
• The fix can be completed without contacting manufacturer support by carefully opening the unit and reseating connectors.

Depends on

• The discussion mentions a monochrome OLED screen prone to burn-in but does not detail if this is related to the power-on problem.
• Caution is needed when handling the ribbon cable as it can be damaged during the repair process.
• Only one user confirmed successful resolution using this method.

Gear in this thread

HU3

Parts

Follow Focus

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