“Powers on, but gives a ‘check internal battery’ error. I’ve tried replacing the battery several times, but no success. It doesn’t retain any sounds in internal memory. Also, the 4 buttons (Upper/Lower/Value/Local) next to the X/Y joystick don’t work.
It is possible to load and play patches one at a time into RAM via SYSEX or MIDI and the Roland D-50 Librarian software on a PC (see picture 8), so the keyboard does work. All the keys work and respond to velocity, and the rest of the front panel functions, including the bender and after-touch.
It sounds lovely with a low noise floor and all outputs seem to be functioning correctly as well as MIDI in/out/thru. I haven’t tested it with a memory card as I don’t own any to test with.
I tried to fix the problems myself by replacing several capacitors, diodes and chips on the main board, having taken advice from an engineer, but to no avail. My soldering is not neat but the replaced components appear to work correctly.
The exterior of the keyboard has various scratches and scuffs, some of the keys have chips/marks, all consistent with age. (See pictures)
Given the above problems I am selling the keyboard strictly for SPARES OR REPAIR, although I recommend repair to be attempted only by a professional electronic musical equipment repair technician. I will not consider selling individual components separately. This auction is for the whole keyboard. No power cable included, but uses a standard IEC kettle lead. UK Voltage 220V-240V.” Click here to search for synths on eBay
“A studio-use only mint condition JP8080.
“You are bidding on a Roland JX3P in good physical and full working condition. It is a 1983 relic, so is NOT mint, but the light surface marks and tiny scratches are superficial. I would say this is in excellent condition though and only upon close inspection can you see it is not mint-perfect. I doubt anyone would be disappointed. All the functions, buttons, memories, lights etc are working as you would expect. Power lead, with UK 3 pin plug, is attached to the synth.
“One of the most iconic drum machines ever produced, the Roland TR-808. This unit is fully functional with no electronic issues, very good condition. The only defect is the grounding prong missing from the power cord. Overall one of the cleanest TR-808 we have come through our studio. Legendary sounds and really fun to play with!” 
“this Roland WS-1 Programmer for Roland CR78 Analog drum machine has been in dry storage for over 25 years. good condition but missing the two button top caps. get it before it’s gone, Sold as is, All sales are final.” 
“vintage ROLAND JUNO 106 keyboard synth
“Roland Juno-60 synthesizer. Bought brand new, left at parent’s house in the 80’s and forgot about it. It is barely used. It works as it should and sounds like an 80’s analog synth.” 
“This Keyboard is used, has light scratches on the top and bottom and has a crack on the back right hand side by the power outlet.” 
“Bought back in 2011 for light studio usage, plays and sounds solid. As with most vintage gear there are a few minor blemishes, yet it still stands out clean in any studio setup. ” 
“Vintage Roland JUNO 2 Synthesizer. It seems that the “after touch” feature is not working, but otherwise it is in excellent working and cosmetic condition. Includes the cord. It has its original box, and will be shipped inside it. ” 
“One of my all-time favorite synths with a big, fat, unique analog sound that also incorporates some of the percussive attacks of the DX-7 along with it’s analog fatness. It’s in overall good shape with some minor scratches and scuffing.
“Overall in good condition. Fully functional keyboard. Various sliders need repair.
” HERE IS A ROLAND JX-3P SYNTHESIZER KEYBOARD. TESTED AND WORKING, ONLY TWO OR THREE OF THE EFFECTS BUTTONS ARE A LITTLE HARD TO PRESS . HAS SOME MINOR SCUFFS/PAINT CHIPS ” 
“Up for sale, my vintage Jupiter 4. Serviced by Mike Metz of Thesis Audio, it sounds fantastic! There is a little cosmetic wear and tear that can be seen in the photos.”
“Chance to own the original classic TB 303 bass line. For that amazing acid sound. good condition for a 35 year old machine that has had plenty of use as most have. (see photos for condition). Fully working i have tested today as i havent used it in about 8 years. tested with batteries as i have no AC adapter. It did work with adapter when i had it in my studio years ago and still should. when tested I noticed a cracking sound when turning the volume but this faded to almost nothing after playing with it for half hour so should completely disappear with more use. it didnt do this when i used it regularly. “
“Nothing comes up on the display
“This is my used Korg Mono/Poly synth. I’m really sad to let this go, but I just don’t have the studio space for it anymore. This was well cared for in a smoke-free environment, but it did sit in a closet for years until now and it got a little dusty. I just tested it and cleaned the surface, and all oscillators and features seem to be working, but there are a few keys that seem to need a little extra pressure to respond (all of the keys do work), but even after I played it for a few minutes the issue seemed to clear up and those keys got more responsive right away (specifically: the G2 seems to take a little extra pressure. B1,F2,G4,B4 just slightly delayed but quickly improved).. so I suspect that it could just use an internal cleaning, maybe even a blowing out would fix it up? The rest of the knobs and switches are intact and working. The volume knob was scratchy for a moment but that went away after a few rotations.
“There is a weird power supply cable wired in not by me though it still works fine” 
“Serviced one month ago at the excellent keyboard repair department of Main Drag in Williamsburg, Brooklyn, this Korg Poly-61 M works perfectly, has cleaned pots and switches, and comes with all the original factory presets on board. Has a few cosmetic dings and nicks on the wooden side panels, but otherwise like new. Condition excellent / very good. RARE. This is the only one I’ve ever seen. Arpeggiator and joystick plus the chord memory feature make this a unique addition to anyone’s analog keyboard collection. Great for the ‘Stranger Things’ vibe too. Gritty 80s basses, weird squiggly strings, fun to play with the joystick to modulate the sounds.” 
“KORG MS2000R in awesome condition (considering its age). Extremely minimal rack rash around the edges of the mount holes, no damage to silk screening, no dents or warps. Fully functional and of course sounds great.” 
“The EX-800 is an awesome 1980’s vintage tabletop synth, engineered for reliability and packing the highest quality sounds of its day. Comes with a new power supply, original data tape with original patches, and manual.” 
“Korg EX-800 Polyphonic Synthesizer.
” in very good cond works fine couple very small light scratches but looks good” 
“I am selling my Yamaha DX7. It is fully functioning despite its signs of ageing. There is a tiny hole on one of the parameter buttons and a few keys are stained (see pictures). The power plug is French but the voltage being the same, there won’t be any issues using a travel adapter. ” 
“Excellent condition, with PSU and Pop Standards expansion card. Home studio use only. Collection only from East Kilbride.”
“Good condition (a few marks) and good working order. ” 
“Fully working Yamaha CS01 II. Missing VCA knob on breath control and minor body damage but overall good condition. This is the II version and rarely come up for sale. I have owned this since the mid 90’s and have taken good care of its. Powered by 12v power supply (not included) or 6 AA batteries (included).” 
“YAMAHA DX 7
“This Keyboard is in Good cosmetic condition. The housing is free damage but has some scratches mostly located on the end caps which is typical from prior use and ownership. The keybed is free of damage but has some dust stuck in the hard to get to places. The keys are moving as intended. The buttons and faders are also moving smoothly and properly however, the mod and pitch wheel are slight bent but are moving. The display screen has some fine faint scratches that are nearly unseen while in use. The rear panel is clean and free of damage. Please see images.”
“A little rough but I assure you it works as it should.
“Auction for a Yamaha DX100 FM Synthesizer. Some minor cosmetic flaws, but is fully functional to my knowledge (tested, powers on, makes sound, all presets are functional, pitch controller, oscillator wheel, volume slider, etc. all working). Not skilled enough to have tried to make my own patches.
“externally in excellent condition no dents cracks or wear on edges
“Yamaha tx802
“Sequential Circuits Multitrak SCI Vintage Analogue Polyphonic Synthesiser with power unit.
“I’m selling my pro one. It’s in excellent and it has lived in a smoke free studio for the last decade. I have a prophet 5 which is my main synth and I just don’t use the pro one enough to justify keeping it. ”