dolt Posted May 26, 2013 Share Posted May 26, 2013 My spider valve when turned on shows 8 black bars on the lcd display , nothing else works , i cant get no sound at all . I try to change the presets but cant get rid of the 8 black bars . I have only had this amp for maybe 18 months and i have seriously hardly ever used it , i just turned it on the other day and all i now see is 8 black bars . Please help as i am wanting to sell this amp and my podxt live and my epiphone as i just dont use them anymore . Quote Link to comment Share on other sites More sharing options...
atreyu2112 Posted May 28, 2013 Share Posted May 28, 2013 Dude, I am having the EXACT same problem. And I want to keep mine. I love it! I need help too. Quote Link to comment Share on other sites More sharing options...
napynap Posted May 29, 2013 Share Posted May 29, 2013 ...'nothing else works' After checking basics such as power outlet, power cable connections, then maybe a factory reset will get the screen working. *Caution: This will erase any user presets (http://line6.com/support/docs/DOC-4540) The factory reset for the Spider Valve series is to hold the "A" button while powering the unit. Quote Link to comment Share on other sites More sharing options...
bigmose Posted August 6, 2016 Share Posted August 6, 2016 Hello Sports Fans Started monitoring posts today. Been a long time Line6 user. I have the 1x12 MKi , MKii, 2x12 MKii, M9 and shortboards FBV MKi and MKii. The harness cable located on the DSP board near input jack is notorious for coming loose. This loose harness cable will give rise to the symptoms you are experiencing. Once snugged in I use a strip of masking tape along the seam to hold it in place. More convenient then a dab of super glue, nail polish, of gum. Bigmose Quote Link to comment Share on other sites More sharing options...
jspina54 Posted November 5, 2021 Share Posted November 5, 2021 I’m having the exact same issue with my Bogner line 6 112… reseated all the connections but still have 8 black bars and no sound… I can tell the power amp is working but no controls work or is there any sound! Help! Quote Link to comment Share on other sites More sharing options...
psarkissian Posted November 5, 2021 Share Posted November 5, 2021 Main board fatal error. Not a MkII? Quote Link to comment Share on other sites More sharing options...
RandR10 Posted November 16, 2021 Share Posted November 16, 2021 Anybody come up with a resolution for this? I have this amp and it's probably the best sounding amp I've owned. Would like to save it if possible. Is it definitely a main board fatal error? If so, what component on the board could cause this failure? I might be able to fix this myself if I know what to look for. Quote Link to comment Share on other sites More sharing options...
psarkissian Posted November 16, 2021 Share Posted November 16, 2021 For the MkI, it is a fatal error. No solution as there are no more main boards. And MkII boards are NOT a compatible replacement, totally different programming. It is not a self repair as one of the chis affected has the program on it. 1 Quote Link to comment Share on other sites More sharing options...
RandR10 Posted November 17, 2021 Share Posted November 17, 2021 Thanks for the reply. I've been doing some playing around with it, and I've found that the actual power amp on this works absolutely fine, it's just obviously dry with no tonal control or effects, which are part of what made this amp sound so incredible. That said, what do you all think of the idea of buying another spider series amp, gutting the preamp circuit boards from it, then frankensteining the preamp from that into this chassis? I see those come up really cheap used all the time. I've looked into driving it with something like a high end multieffects pedal, but to have something that could replace what was in the amp to start, it would cost about the same as a whole used replacement amp. Quote Link to comment Share on other sites More sharing options...
psarkissian Posted November 17, 2021 Share Posted November 17, 2021 Go with the MkII version. Quote Link to comment Share on other sites More sharing options...
jspina54 Posted November 17, 2021 Share Posted November 17, 2021 That solution was given to me also...drive it with a separate preamp. Great idea! What bothers me though...in my case, the amp worked perfectly last May...unplugged it and put it away...last week I turned it on and zippo, just the bars on the display! WTF! Never ever had an issue with this amp. Gigged regularly with it until a few years ago so now it gets very little use...so strange! 1 1 Quote Link to comment Share on other sites More sharing options...
guyatone Posted June 13, 2022 Share Posted June 13, 2022 I was able to fix the "black bars" issue on my 212 Mk1. The problem was that one of the solder joints of the voltage regulators on the DSP/preamp board came loose and it didn't supply the required +5V any more. If (and only if!) you have the necessary experience to work with the insides of a high voltage device like a tube amp, it's quite simple to diagnose. The preamp board has test points for the various voltages and you can probe them with a multimeter. Once you find that one of these DC voltages is missing, you can find the matching voltage regulator (IIRC there are three, two through-hole and one SMD) and see if the regulator itself is broken (there are reports of them overheating) or if it's only a dead solder joint. 1 Quote Link to comment Share on other sites More sharing options...
Jt666 Posted January 29, 2023 Share Posted January 29, 2023 Similar situation the amp wasnt used for 6 months and when it was switched on just the black boxes in the display no lights etc Power amp is working but preamp and effects all not So sadly its a big very heavy lump which can't be used if the technician in the thread is correct that its a fatal error and no parts are available Have to look for a replacement,this time without all the built in effects etc, so no fancy programming, I'll use a separate effects unit Quote Link to comment Share on other sites More sharing options...
psarkissian Posted January 30, 2023 Share Posted January 30, 2023 50/50 a Line 6 authorized tech can fix it. They would contact us thru our tech channel for more details. Quote Link to comment Share on other sites More sharing options...
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