Or for about $49 you can pick up a portable DVD player that has the same input. When the LCD display died on one particular model of the PSR series, lots of guys did this and kept on working until Yamaha came up with a free fix.

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)