Yamaha SY77, TG77, SY99 LCD replacement
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Yamaha SY77 Clean / Repair / Restore
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SY99 screen and battery replacement, short sound demo
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Outdated: FlashFloppy Gotek Floppy Emulator for Yamaha SY77/SY99 (STM32-based, see description)
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Reviving The Yamaha Sy77: Battery Replacement Guide - Restoration Part 3
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Reparacion roland d50 enciende pero no inicia el sistema. Solo prende luz upper y luz de pantalla
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Reviving The Yamaha Sy77: Changing the power cord - Restoration Part 6
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How to fix dead LCD backlight and change CCFL to LED on display panels
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