Troubleshooting Problems

LED Issue MP1

Started by Mojave

Replies: 4
Views: 4,299

December 31, 2023, 12:47:45 PM
by Mojave

MP-1 Classic dead

Started by tangohf

Replies: 4
Views: 4,255

December 07, 2014, 04:50:19 PM
by MarshallJMP

Mp-1 v2 mod 3 no output in tube anything

Started by bunkyloo

Replies: 10
Views: 4,249

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

MP1 and Cold Exposure

Started by Chip Roberts

Replies: 2
Views: 4,240

December 10, 2017, 08:17:01 PM
by herbyguitar

Hum and Crack on DIST mode

Started by Jonar

Replies: 3
Views: 4,038

August 31, 2014, 01:28:19 PM
by MarshallJMP

Bad buzz or rumble on mp-2 high gain modes

Started by h.e.l.shane

Replies: 2
Views: 3,988

July 14, 2014, 09:43:55 AM
by W.Laturno

ADA mp1 - Solid States works only

Started by gg85

Pages1 2 3

Replies: 31
Views: 3,806

October 05, 2023, 11:42:29 PM
by rnolan

Rear Input Jack

Started by Jaster

Replies: 1
Views: 3,786

March 16, 2015, 04:05:22 AM
by rnolan

Light went out on MP-2 display

Started by Ekornbakke

Replies: 2
Views: 3,766

November 19, 2014, 05:22:06 AM
by rnolan

ADA MP-1 v1.36 Switches on! Normal background noise there, but no Output!!!!

Started by Pedro

Replies: 14
Views: 3,737

November 24, 2020, 11:43:50 PM
by rnolan

No sound on select preset channels and weird output level knob behavior

Started by Andrew Smith

Replies: 2
Views: 3,733

March 07, 2018, 04:22:32 PM
by Andrew Smith

MB-1: Brand New Tubes, no sound on "Edge" or "Full" settings...

Started by BoWeevil2017

Replies: 1
Views: 3,323

February 21, 2017, 12:57:24 PM
by MarshallJMP

Midi issues

Started by dannyde

Replies: 1
Views: 3,285

April 12, 2014, 07:17:04 PM
by rnolan

110v -> 220v

Started by Sirion

Replies: 2
Views: 3,245

January 05, 2017, 09:07:01 AM
by MarshallJMP

MP2 starts out quiet but gets gradually more noisey

Started by h.e.l.shane

Replies: 0
Views: 3,207

July 21, 2014, 10:39:10 PM
by h.e.l.shane

ADA MP-1 Ground hum with good gain

Started by bunkyloo

Replies: 3
Views: 3,060

November 10, 2018, 02:50:27 AM
by MarshallJMP

MOVED: Techniques and tooling

Started by rnolan

Replies: 0
Views: 3,005

April 16, 2016, 05:00:51 AM
by rnolan

B200s hum

Started by duecemfhatchet

Replies: 3
Views: 2,907

August 20, 2019, 09:24:04 AM
by MarshallJMP

MP1 1.38 - Is my Chorus failing???

Started by skarkowtsky

Replies: 11
Views: 2,899

May 09, 2021, 02:50:58 AM
by MarshallJMP

New Member - just got an old MP-1 - no sound - it does turn on

Started by Overtone85

Replies: 1
Views: 2,889

October 30, 2018, 01:03:45 PM
by MarshallJMP