Troubleshooting Problems

Bass setting not saving

Started by revhed666

Replies: 14
Views: 7,552

March 31, 2014, 09:51:25 PM
by rnolan

MP-1- err 1 on startup

Started by tabascojunkie

Replies: 8
Views: 7,619

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

MP-1 v.2 Not editable equalizer.

Started by RVLP

Pages1 2

Replies: 15
Views: 8,153

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

Ah the joys of troubleshooting

Started by Dante

Replies: 14
Views: 8,299

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

MP1 v 1.38 no sound can someone help me out?

Started by Wormwoody

Pages1 2

Replies: 16
Views: 8,432

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

Help with mp1 - low distortion and "sputtering"

Started by Cstecker

Replies: 13
Views: 8,503

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

MP-1 high pitch squeal

Started by kfowler8

Replies: 13
Views: 8,509

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

Rack grounding?

Started by Georgeclooney0

Pages1 2

Replies: 29
Views: 8,587

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

No lights, no display, no sound

Started by emunstar

Pages1 2

Replies: 25
Views: 8,713

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

ADA MP-1 Extreme Restoration

Started by SteveFuzz

Replies: 14
Views: 8,737

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

Gain drop

Started by Richie_B

Pages1 2

Replies: 17
Views: 8,784

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

Microtube 200 with no output

Started by calan

Pages1 2

Replies: 15
Views: 9,864

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

MP-1 no display or LED's

Started by andtimebegins

Pages1 2 3 ... 5

Replies: 70
Views: 9,900

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

Microphonic type squealing

Started by Darth Infernus

Pages1 2

Replies: 18
Views: 10,285

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

MP2 suddenly noisy after a show

Started by SidecarJoeG

Replies: 13
Views: 10,538

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

Extreme hiss and microphonic V1 tube circuitry

Started by NeverAfter

Pages1 2

Replies: 19
Views: 10,545

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

MP-1 volume drop

Started by revhed666

Pages1 2

Replies: 21
Views: 10,690

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: 10,974

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: 11,596

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

MP1 No Overdrive/Distortion

Started by Billy Penn

Pages1 2

Replies: 23
Views: 11,894

July 12, 2016, 06:38:00 AM
by rnolan