Troubleshooting Problems

No Distortion on the Distortion Channel

Started by Misticmyst73

Replies: 2
Views: 4,598

December 05, 2013, 04:44:31 PM
by SidecarJoeG

error codes

Started by Mike_Revis

Replies: 3
Views: 4,357

March 27, 2014, 03:45:20 PM
by MarshallJMP

Programming patches - inconsistent behaviour

Started by MikeB

Replies: 4
Views: 4,753

March 18, 2015, 09:39:15 AM
by MarshallJMP

Very Strange Behaviour

Started by MikeB

Replies: 4
Views: 5,683

June 12, 2015, 03:21:17 PM
by MikeB

MP1 Classic Err 7

Started by leninvargas

Replies: 6
Views: 4,831

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

front panel

Started by kserri

Replies: 3
Views: 4,666

December 03, 2018, 01:11:27 AM
by rnolan

Front panel don´t work

Started by kserri

Replies: 5
Views: 5,107

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

MP-1 high pitch squeal

Started by kfowler8

Replies: 13
Views: 8,560

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

U.S. MP-1 Repair

Started by kfowler8

Replies: 5
Views: 5,377

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

Battery Issue in MP-1

Started by kfowler8

Pages1 2

Replies: 18
Views: 15,281

March 27, 2015, 01:07:53 PM
by MarshallJMP

MB-1 Error Messages

Started by kawai2g4b

Replies: 2
Views: 5,205

November 29, 2013, 08:14:48 PM
by kawai2g4b

Hum and Crack on DIST mode

Started by Jonar

Replies: 3
Views: 4,041

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

Rear Input Jack

Started by Jaster

Replies: 1
Views: 3,788

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

MP1 No Output, "Magic Smoke" smell

Started by Hambone

Replies: 7
Views: 1,860

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

[Solved by MarshallJMP] MP1 doesn't start up - mysterious blinking

Started by hal2000

Pages1 2

Replies: 21
Views: 13,873

January 27, 2014, 10:03:05 AM
by MarshallJMP

Bad buzz or rumble on mp-2 high gain modes

Started by h.e.l.shane

Replies: 2
Views: 3,991

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

MP2 starts out quiet but gets gradually more noisey

Started by h.e.l.shane

Replies: 0
Views: 3,211

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

Viper probs, info moved from Schematics section

Started by guitardude57

Pages1 2 3

Replies: 32
Views: 15,005

June 02, 2017, 03:28:21 AM
by MarshallJMP

MP-1 Flipping Presets

Started by Griphook

Replies: 10
Views: 5,361

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

ADA mp1 - Solid States works only

Started by gg85

Pages1 2 3

Replies: 31
Views: 3,898

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