psarkissian

Take it to a Line 6 authorized service center. It's not a self repair problem. Which fuse is it?

The 10-gauge set is fine, it's factory, 11-gauge is fine as well. Have the set-up done by a proper guitar tech, preferably a Line 6 authorized one who has access to service info. They will be able to dial it in to where you want it, with limits.

10-gauge or 11-gauge sets.

Stick to the color coding. Also check with the maker of the pick-up or any instructions that came with the pick-up.

Re-Flash the firmware using the Line 6 Monkey.

8.9 k-Ohms should be okay, just a smidge darker warmer tone.

FBV port and Variax VDI connect are two different things. POD racks can be controlled by FBV boards, amps can be controlled by FBV boards. Do not plug a Varia into an FBV port.

No. Don't do that.

Schematics, tech manual,... not available to the public.

Scratchy noise sounds like popcorn?

" Who would have thought that the firmware would fix the MAG pickups?! "--- being the guy that works on these, I would. But that's only because I've seen this before a couple of times and know what to expect. These are a little different than the Variax of old, and that tech was probably my lab mate. :) Glad you didn't pull the pick guard, many do and regret getting in too deep, then it ends up on my bench. That occurs all too often. :( Glad I and my colleague in Support could help. Now make some music. :)

" So if anyone else out there experiences this, you want to order the "PCB-A Main Guitar+G11," part #50-02-0320-2 from Full Compass. "--- that doesn't always work for all boards. The afore mentioned query list is a starting point for troubleshooting. And that part number only applies to JTV-69/69S, special order thru FC. Your older one may have a different firmware revision in it, so it will sound different than your later serial number guitar. Not advisable to do self repair, as these are not passive electronic guitars. There's more to these than meets the eye. Got to cuddle this cat under the chin a little differently.

Are they the factory tubes? How old are the tubes, when were they changed out and biased last?

:) ^ ^ Sorry, the emoji's stopped working on here for me.

Don't pull the pick guard. -Are the volume and tone pots loose? -Have you been doing any custom patches in Workbench? -Download any 3rd party custom patches?

No problem.

No. But if I have some tenuous tie to him, then so do you by extension,... one degree of separation. I could name drop some more, but that would truly be rubbing it in. I wouldn't want to do that to you guys. BTW,... you all have one degree of separation between you and the 60's rock band Iron Butterfly. I used to crew for them in the mid to late 1970's.

Yes,... surge can come from any of the afore mention reasons. But here in the original post, there are two problems, the damaged USB connector and the power cycling. Two different problems unrelated to the original post, it's not a blanked chip, it's some proprietary stuff I can't get into with end users. -USB would affect communications and ability to update and save edits. -Power cycling with the resetting logo is something internal that can't fix by the user. Requires an authorized service center (no short cuts around that one).

Afraid there is no portability of patches between these product. Take notes on the settings you're using, recreate them in the new unit and save it. Make any adjustments from that and save it. If Gearbox will still run on your computer, you might want to make use of that to save the original re-creation and the edited versions as needed.

It wouldn't be the processor itself, but the memory (RAM or ROM) data loaded into a processor. If there is a power surge high enough, it can put any memory chip out of Read Mode and into Write Mode, and re-write memory or blank it altogether.

Should be listed in the specs and instructions that come with pick-ups.

Agreed. Had another encounter (briefly, he's a busy guy) with Mr Parsons at NAMM last Saturday. Always good.

Your choice. Either one works.

As always, have a Line 6 authorized tech do the biasing of the power tubes. There is a specific procedure for bias and other calibrations that are required.