Video and text based help on the link
https://www.google.com/search?q=Ypg-625+key+is+stuck+upward
..
Posted on Jan 19, 2021
SOURCE: What needs to be removed from my Yamaha YPG-625 to
DO NOT open the case unless you are aware of and comfortable with the fact that you could _destroy_ your piano. Easily.
Observe appropriate anti-static precautions. It should go without saying that this is an electronic repair, and dangerous voltages may exist inside the case.
1. Remove the stand if you have one
2. Lay the keyboard upside down (bottom up) on workbench
3. Remove all 90+ screws from the bottom of the chassis, including the 14 inside the speaker compartments
4. Carefully lift up on the bottom case part, taking not to damage the speaker lines
5. Unplug speaker connector and set lower case aside
6. LCD is mounted beneath main logic board
9in the center), my problem lies elsewhere, but competent and cautious service technique should lead you where you need. I would strongly recommend replacing the LCD assembly module, unless you are experienced in LCD repair.
Posted on Nov 08, 2009
SOURCE: reboot instructions for a Yamaha
Read about initialization on page 61 of your user manual. This is a factory reset. There are two procedures there. If you don't have the manual download it here:
www.yamaha.com/yamahavgn/.../ypg_525_eng_manual.pdf
Posted on May 04, 2011
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