psarkissian

First off,... keep your fingers out of the insides of it. Even with the power off, there some high volt capacitors in there, and it really hurts when you get zapped by them. Second, self repair of these tube amps is ill advised, unless you have lots of experience with these,... ... because third, if something goes wrong, it could get further damaged beyond anyone's ability to fix. https://line6.com/find/service_center/ , so go with the authorized service tech with experience with our products. "Can I scavenge parts like a control board or other things from the 40w combo to use in the HD100 head? "--- No. Different boards,... especially the main boards as they are programmed different for 112, 212 combos and the heads. And output load boards and UI boards are different. Combo parts are NOT interchangeable with head parts (and vice versa). "General oddness ",... when was the last time the tubes (valves) were replaced??? Are the specified 12AX7 pre-amp and matched quartet Sovtech 5881 medium tubes?

Both batteries are -0009's,... Maybe the battery box. Have the 59 checked out at a Line 6 authorized service center. And if they want to pick my brain further, they can contact me thru our service tech channel. Thank you jerseyboy.

What silverhead said.

Sorry, but Microsoft and Apple had forsaken 32-bit apps and is doing only 64-bit. So you may want to take that up with them.

Heat,... it can have some effect. Remember, you have 11 year old gear, and probably hasn't been serviced in some time. So more than likely your batteries are as old as well, as may be getting a bit spent by now. Even Li-Ion batteries need replacing at some point.

98-034-0009 is the current part number for batteries. Being what an early serial number it is, could be one or combination of what I listed. Triodo Service S.N.C. Via Caduti Di Nassiriya N .47 Bari, BA-70124 080/5013427 info@triodo.it ... would be the closest to you.

Or a combination of both. The 500 Electric is an older product (came out around 2003). Solder points and other connection may be getting a bit intermittent by now.

1-What are the last four digits on the battery part numbers? Could be it's time for newer more current ones. 2-Could be an issue with the battery box. 3-Some other thing deep inside pulling down current. More than likely #1. Contact the Line 6 authorized service in your area, they will have more experience with these. https://line6.com/find/service_center/

If it's buzzing like that, it is more than likely a grounding issue somewhere inside. Best to contact the nearest Line 6 authorized service center in your area. Don't try to self repair it, leave it to those who have experience with the product. https://line6.com/find/service_center/

500 connects using the VDI port and VDI cable,... and will power the 69. But it can't be used as an interface for updating the 69. 500X connects and powers thru the VDI, connects to Monkey and Workbench HD app.

Op-amp circuits in the guitar on a separate circuit board custom mod. Need someone good with op-amp circuits who knows how to buffer and impedance match the output, so that it can drive enough signal to whatever the effects or amp is,... without frying anything. Basically a booster circuit in the guitar. Or do the same, only with an external booster box, and a 9V battery. In both cases, using the 1/4" TRS output jack. Will need a custom guitar circuit person (someone other than me) who is up on this stuff.

Supply is 9V using battery power, XPS is the same. Inside, it sets-up what is need for the analog and digital circuits. But it isn't just the voltage. It has to be the correct current draw as well,... and each product has a different current draw. Best to get the correct Line 6 items for that.

Other possibility would be warbling, hence the post about pick-up height adjust. Old strings is another.

Could be dual tone effect, when hearing both the string from the guitar and the de-tune from the amp. Press Hi-E string at the highest fret, be sure the string distance between the magnetic pick-up pole piece and Hi-E string is 2mm (1/16 in, 0.07874 in).

Sure.

Early 2011. World Music, Korea.

First thing that comes to mind is the set-up, the pick-up-to-string distance. Solder point or (not very common) problem with the pick-up itself. Have it checked out at a Line 6 authorized service in your area.

"Regarding spare parts - I wonder if Line6 would sell to individual owners so they could perform their own work. " --- Some are available, some are not, and are acquired through Full Compass. Self repair is not a good idea with these, unless you have lots of experience at these.

Thank you jerseyboy. A 12 year old 59P,... I can deal with it for you. For that, log a Support ticket in your account to contact Line 6 for a return authorization. They will contact you with options.

Error code 8000900C MIDI device timed out, does not mean it is bricked. Double check the OS of your computer with the the application. Make certain you are using the correct OS for that app.

Less about the computer,... more about the computer OS. Check the Downloads page on this site for OS compatibility. The 500 Electric will connect to original Workbench, but not Workbench HD. There is no Workbench like app for the basses.

Software issues,... not really much of an issues as much as it was tone or amplitudes. Support and parts are still available, for now, and so long as I'm here at Line 6, there is someone to service and repair them.

Very good.

Still available, don't know what the stock level is. Best to have an authorized service center check it out, maybe it's just solder points or maybe it needs replacing. Best let the service center deal with it. It can be a finicky switch if you don't know how to deal with it.

Typically, a solder point or two. Early 2012 build, so a couple of solder points on the 3-way switch may be oxidizing after 12 years. Recommend an authorized service center in your area or log a support ticket like silverhead suggested.