CONDITION: Pulled from a working Yamaha DGX-640 with a GHL88 88-key action. Board is clean with no burnt components, cracks, lifted traces, or repairs. Rubber contact strip is soft, seated correctly, and shows no tearing. Ribbon cable and connector are intact with straight pins. Expect normal light wear from prior use and handling. Shipped within one day of payment. ? DESCRIPTION: OEM Yamaha GHL88 left-side key contact board removed from a DGX-640 digital piano. This is the bass-end contact PCB that reads the key presses for the lower notes. It includes: ? Factory GHL88 contact PCB (marked GHL88 / X6244 ?L? board) ? Original grey rubber contact strip installed on the board ? Attached ribbon cable, ready to plug into the main scan harness Ideal if you have a DGX-640 (or any other GHL88-equipped Yamaha keyboard) with dead or intermittent bass keys caused by worn or contaminated contacts. Replace your failing board while keeping your existing keybed and chassis ? no soldering required. ? SHIPPING SELLER INFO: Ships fast ? 1-business-day handling. 30-day returns, USA seller. ? SEARCH KEYWORDS: Yamaha DGX-640 contact board right side GHL88 88-key keyboard sensor PCB rubber key contacts treble end digital piano repair part