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- Mar 9, 2021
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Psr i455 keyboard , when powered on , shows only “ YAMAHA” message, on power on.
When powered on with start button pressed goes to OS UPDATE MODE. If anyone has firmware ( operating system ) file in PRJ format, please post here . Needed urgently.
When powered on with start button pressed goes to OS UPDATE MODE. If anyone has firmware ( operating system ) file in PRJ format, please post here . Needed urgently.