Troubleshooting Problems

V1.38 gain drop/loss just seconds after startup / warmup (solved)

Started by Systematic Chaos

Replies: 11
Views: 5,322

October 28, 2022, 07:26:03 PM
by rnolan

MP-1 MIDI not working

Started by niksa

Replies: 11
Views: 9,604

January 10, 2021, 06:30:02 AM
by MarshallJMP

Mp-1 v2 mod 3 no output in tube anything

Started by bunkyloo

Replies: 10
Views: 4,605

October 05, 2018, 02:16:17 AM
by rnolan

MP-1 Flipping Presets

Started by Griphook

Replies: 10
Views: 5,709

July 26, 2018, 11:18:15 PM
by Griphook

Wrong channel comes up on my MP-1

Started by Darth Infernus

Replies: 9
Views: 6,874

May 22, 2015, 01:36:41 AM
by rnolan

Low Volume & Unpleasant Distortion in one output channel.

Started by Auntie Ada

Replies: 9
Views: 7,512

July 29, 2015, 02:26:50 PM
by MarshallJMP

MP1 - > Midiverb II -> UX2?

Started by Chip Roberts

Replies: 9
Views: 5,653

April 23, 2017, 04:14:44 PM
by Harley Hexxe

MP-1- err 1 on startup

Started by tabascojunkie

Replies: 8
Views: 8,015

July 27, 2017, 03:50:00 AM
by MarshallJMP

MP1 - Developed very loud hum on tube settings

Started by MR THUD

Replies: 8
Views: 4,215

August 29, 2022, 11:38:14 AM
by MarshallJMP

Got noise???

Started by Dante

Replies: 7
Views: 6,316

January 15, 2018, 12:27:21 AM
by rabidgerry

MB-1 no output

Started by peoriashows

Replies: 7
Views: 4,987

July 28, 2018, 11:51:45 PM
by rnolan

MP1 Classic Clean Issue

Started by AndiK

Replies: 7
Views: 5,035

May 01, 2019, 04:06:36 AM
by MarshallJMP

MP1 No Output, "Magic Smoke" smell

Started by Hambone

Replies: 7
Views: 3,658

August 20, 2022, 06:02:27 AM
by Harley Hexxe

MP1 Classic Err 7

Started by leninvargas

Replies: 6
Views: 7,461

May 08, 2023, 12:50:40 PM
by MarshallJMP

Clicks when switching presets

Started by sadky

Replies: 6
Views: 5,373

October 03, 2014, 05:47:22 AM
by Systematic Chaos

MP-1 Classic Noise Gate "stuck" at max values even when turned off

Started by Bret

Replies: 5
Views: 14,152

April 24, 2024, 03:19:42 PM
by Harley Hexxe

U.S. MP-1 Repair

Started by kfowler8

Replies: 5
Views: 5,555

September 06, 2016, 06:28:36 PM
by kfowler8

Solid State Clean Gets Nasty

Started by Moff40

Replies: 5
Views: 3,318

August 29, 2022, 09:34:51 PM
by Moff40

Ground hum noise

Started by dave_daut

Replies: 5
Views: 5,129

April 08, 2014, 08:45:59 AM
by rnolan

Front panel don´t work

Started by kserri

Replies: 5
Views: 5,223

January 30, 2015, 04:21:33 AM
by rnolan