psarkissian Posted December 16, 2019 Share Posted December 16, 2019 Could be the power mange circuit in the battery box on the guitar. Solder point or program glitch could send a "false battery low signal" to the main board, which would keep it from turning on. And don't use any of those cheap 3rd party batteries, use the correct Line 6 versions. Have had a number of problems with other batteries from other sources. Have the JTV-59 checked out at your local Line 6 service center,.... https://line6.com/find/service_center/ Quote Link to comment Share on other sites More sharing options...
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