” Yamaha SY77 Vintage Keyboard Synthesizer – NOT WORKING.
Please read the description carefully. I am not the original owner so I don’t know what’s broken or if it can be fixed. A couple weeks ago I bought this from another seller on here who listed it as “tested & working”. When it arrived it clearly didn’t. I then looked at the photos again and realized it wasn’t even the same SY77. I asked the seller if they had perhaps sent the wrong item by mistake, they gave me a full refund but offered no explanation. (You however will receive the exact item pictured, as shown by the serial number printed on the back). To corroborate my story I’ve posted my purchase and refund in the last two pictures, but if you have any doubts about this item, please do not buy.
The synth turns on, but the screen is completely blank. I know the screen is getting power because the contrast knob works, but nothing appears and there is no sound. I checked the power supply and verified all secondary voltages (+5v, -5v, +12v, -12v) work properly. I believe the floppy drive is dead because when I turned it on the red light kept blinking, so I disconnected it from the board. The screen backlight is also dead (a common problem with these) so I disconnected the backlight inverter too. Made no difference, the screen is still blank. The back is missing a few screws.
On the plus side, overall cosmetic condition is very good other than a few scratches. All of the keys appear to be in good condition, but since the sound doesn’t work I don’t have a way to test them. I opened it up and the boards look good, nothing is obviously missing. Previous owner soldered in a new battery, I tested it at 2.5v, so most likely someone has worked on this in the last few years. It may be possible to fix this synth or use it as a source of parts, but it’s beyond my abilities so I’m selling it. Feel free to ask additional questions or for more pictures.” Click here to visit listing on eBay