My screen is out on my roland jv 80 keyboard - Roland Music

https://www.roland.com/global/products/fr-4x/
https://www.roland.com/us/support/knowledge_base/203033135/
https://www.long-mcquade.com/74269/Band---Orchestral/Accordions/Roland/V-Accordion---Red.htm
https://www.gear4music.com/Woodwind-Brass-Strings/Roland-FR-4X-V-Accordion-with-Keyboard-Black/1PBQ
https://www.gumtree.com.au/s-nsw/keyboard+piano+roland/k0l3008839

Software, download the Owners Manual and get into it.

Open up the Roland E-80 and check if all connectors and flatcables are well seated.

MIDI cable and MIDI ports

Open up the Roland G-70 and check if all the connectors and flatcables are well seated. Check also if the power supply is working as supposed to.

I.m looking for all the ROLAND JV-90 plastic push buttons.

when i turn on my roland xa it's going on but it show on screen xa fantom and it gonig hang what i do

The name for the notes that don't stop playing is "Dreaded MIDI Drone". It is caused by multiple note on commands and lost "mating" note off commands.

Also read "c." on page 80 regarding buffer length and "choppy" sounds.

There are lots of IC's in the unit. Order from Roland support parts. That will be the only source.