psarkissian

As far as I know, they come in just one length.

It's okay,... sometimes I forget too,... and I'm the guy here at Line 6 that services these things. (LOL)

It will run on Windows 11, what are you running?

"... the battery used in the JTV's are standard camcorder batteries,... ", No, they are not standard camcorder batteries.

Li-Ion yes. Using the current control circuitry to our specifications,... NOT some camcorder maker's specs. Use the specified

parts, I've had nothing but trouble with Variaxes using 3rd party power.

Thumbs up.

Then there is something else going on there that should be checked out by an

authorized service center in your area that knows Variax guitars.

https://line6.com/find/service_center/

Active circuit guitars use TRS (tip= signal, ring= +Vdc, sleeve= return), been that way since

at least the 1970's (when I started dealing with active circuit guitars).

:)

Also a good idea to us 1/4" TRS plug guitar cables.

Line 6 Central does not connect to Variax at this time.

VDI cable impedance is consistent, 1/4" TRS cable impedance can vary some between different makers.

Probably needs a set-up, hasn't been service in some time. Pick-up height, worn string nut, couple other things are typical of the quack sound.

Doubt it's wiring, that would sound different. But good deduction though.

No, the insides are not the same.

Early 2016.

Yamaha plant, Indonesia.

Just checked, necks for JTV-89 or JTV-89F,... none in stock.

Register your guitar in your account, then log a support ticket.

Also, check with Line 6 authorized service i your area.

https://line6.com/find/service_center/

I hoped as much.

Make certain the board is cleaned. Capacitor electrolyte is conductive, can short out other components.

Either an amp IC failed, or an intermittent solder point on the processor board (crackling being digital noise).

Find an authorized service center and have them check it out. 

https://line6.com/find/service_center/

3.71,... very good.

Try using a Google or Firefox browser, and open Monkey using that,... if you aren't already.

What silverhead said.

Line 6 Central isn't set-up for Variax right now, so use Monkey for checking and updating Firmware.

80009000 is a MIDI time out error.

Using the Helix for an interface for update should work. What version Firmware is the Helix? 

No work around without blowing the amp. It is an output impedance thing.

DO NOT try yo disable it.

If you blow the amp, it may not be repairable. It is an old product, and chances are there are no more parts for those.

Workbench HD manual,...

https://line6.com/data/6/0a020a3f142665dadd9e9c8754/application/pdf/Workbench HD Pilot's Guide - English .pdf

1) It's pre-amp out and power amp-in.

2) #1 is the effects loop.

https://l6c-acdn2.line6.net/data/6/0a06434d8ea4507efaf692112/application/pdf/Spider Valve MkII Pilot's Guide ( Rev F ).pdf

Never turn on a tube amp without the correctly matched speaker load on the output(s).