Anthony, I had the same thing happen to mine. I took it apart and cleaned the contact points with a pencil eraser and now it works. Under the key there is a row of rubber boots that when you push down the key make contact with a black dot on the circuit board. With your pencil eraser clean the boot and the black dot. I hope that helps.

my Roland JV80 had the sticky keys the goo was pink in color= have taken it apart n cleaned it but now though the power works i cannot get any sounds from playing the keyboard

I tell you what, you throw the vintage keys board or SR-JV80-99 (many sounds from vintage) in the 80 or 90 and use this as a controller with those synth sounds. Throw this on top of say a Yamaha MO8 and you need nothing else and you'll have easy 9 sounds at your finger tips. Great live set up. These are great controllers with some sonic power of their own.

If you're looking for service manuals, there's a JV-80 yahoo group you can join that has them as attachments.

I too have had the same results as George has previously posted. I bought mine new in '93 and it spent a few years in it's flight case from '99-'06. When i brought it out alot the beyboard manual had become glued together. Talked to an Official Roland technician and he said these synths were notorious for the glue that holds the weights underneath the keys to "melt" over time. Roland had acknowledged this flaw and had a program in the past to fix the problem. Well this was now '07 and the tech had spoke with Roland and they told him if I had the original receipt in my name they would replace the keyboard manual for free. Fortunately I still had the receipt and Roland replaced the whole 61 key manual at no cost. I only had to pay the tech for installation, which was $120.00 Roland really does stand behind their products! Hope this helps some JV-80 owners with a similar problem.