UK Piano Page Piano Forum
Please read the Piano Forum FAQ for more details. Also, read the piano FAQ for common questions on pianos Please don't ask us to place a value on your piano as an on site inspection is required. Contact you local piano tuner who will be more than happy to help.
Phoned Yamaha they suspect a faulty power amplifier, sounds expensive, does anyone have any experience or suggestions
The 170 is still a fairly high spec model so I guess its worth having repaired. If the fault is Yamaha's then they will surely do the repair for free?http://www.silverdaddies.com/
The problem with Clavinovas is that they usually only have a 3-year warranty and therefore you would be responsible for the cost of fixing it thereafter. Check with your seller (local retailer, online supplier, etc.) to check warranty and explain your situation. It is unusual for the hardware to start playing up after say four years of use (it was bought brand new right?). Usually things like keys or velocity sensors MIGHT start to play up around this time but even then, a digital piano is mostly solid and reliable during the first 10 years of its lifetime.