Troubleshooting Problems

MP-1- err 1 on startup

Started by tabascojunkie

Replies: 8
Views: 7,727

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

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

Started by Bret

Replies: 5
Views: 7,956

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

Ah the joys of troubleshooting

Started by Dante

Replies: 14
Views: 8,414

December 14, 2016, 01:27:26 AM
by rnolan

MP-1 v.2 Not editable equalizer.

Started by RVLP

Pages1 2

Replies: 15
Views: 8,438

October 28, 2022, 09:18:08 AM
by MarshallJMP

MP-1 high pitch squeal

Started by kfowler8

Replies: 13
Views: 8,543

September 09, 2014, 01:13:59 PM
by kfowler8

Help with mp1 - low distortion and "sputtering"

Started by Cstecker

Replies: 13
Views: 8,580

February 27, 2017, 03:58:07 PM
by Harley Hexxe

MP1 v 1.38 no sound can someone help me out?

Started by Wormwoody

Pages1 2

Replies: 16
Views: 8,636

May 05, 2018, 10:06:19 AM
by Wormwoody

No lights, no display, no sound

Started by emunstar

Pages1 2

Replies: 25
Views: 8,831

March 04, 2020, 11:42:35 AM
by MarshallJMP

ADA MP-1 Extreme Restoration

Started by SteveFuzz

Replies: 14
Views: 8,844

March 09, 2017, 05:24:45 AM
by Iperfungus

Rack grounding?

Started by Georgeclooney0

Pages1 2

Replies: 29
Views: 8,846

December 04, 2018, 11:07:57 AM
by rabidgerry

Gain drop

Started by Richie_B

Pages1 2

Replies: 17
Views: 8,896

July 12, 2016, 07:22:55 AM
by MarshallJMP

Microtube 200 with no output

Started by calan

Pages1 2

Replies: 15
Views: 9,907

October 30, 2015, 12:34:21 AM
by rnolan

Microphonic type squealing

Started by Darth Infernus

Pages1 2

Replies: 18
Views: 10,317

May 18, 2015, 10:38:38 PM
by Darth Infernus

MP-1 no display or LED's

Started by andtimebegins

Pages1 2 3 ... 5

Replies: 70
Views: 10,483

February 09, 2021, 06:36:21 AM
by Iperfungus

MP2 suddenly noisy after a show

Started by SidecarJoeG

Replies: 13
Views: 10,586

May 10, 2014, 07:12:23 AM
by MarshallJMP

Extreme hiss and microphonic V1 tube circuitry

Started by NeverAfter

Pages1 2

Replies: 19
Views: 10,620

May 06, 2016, 10:33:18 AM
by rnolan

MP-1 volume drop

Started by revhed666

Pages1 2

Replies: 21
Views: 10,759

May 20, 2016, 08:24:13 AM
by Harley Hexxe

No lights No sound and a hot ic

Started by t-rack

Pages1 2

Replies: 20
Views: 11,017

April 28, 2015, 02:38:42 AM
by MarshallJMP

MP-2 After the noise mod - Spanky Clean is distored . . .

Started by W.Laturno

Pages1 2

Replies: 19
Views: 11,641

June 16, 2014, 05:14:37 AM
by rnolan

No Sound

Started by 2ndmoto

Pages1 2

Replies: 18
Views: 11,970

January 18, 2014, 05:50:06 AM
by MarshallJMP