Troubleshooting Problems

MP1 No Overdrive/Distortion

Started by Billy Penn

Pages1 2

Replies: 23
Views: 12,149

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

MP-1 no display or LED's

Started by andtimebegins

Pages1 2 3 ... 5

Replies: 70
Views: 12,428

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

MP1 Tube board issues, like am radio

Started by monty

Pages1 2

Replies: 20
Views: 13,264

January 22, 2016, 12:35:39 AM
by tomy

MP2 Volume drop

Started by Shredzilla

Pages1 2

Replies: 25
Views: 13,354

July 27, 2014, 12:23:00 AM
by Shredzilla

Viper trouble

Started by Dante

Pages1 2

Replies: 18
Views: 13,859

May 05, 2018, 01:24:28 AM
by MarshallJMP

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

Started by hal2000

Pages1 2

Replies: 21
Views: 13,938

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

Sound issues after noise mod

Started by Deregorn

Pages1 2

Replies: 29
Views: 14,644

June 19, 2014, 02:41:35 PM
by MarshallJMP

Viper probs, info moved from Schematics section

Started by guitardude57

Pages1 2 3

Replies: 32
Views: 15,132

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

Battery Issue in MP-1

Started by kfowler8

Pages1 2

Replies: 18
Views: 15,332

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

MP-1 A channel much quieter than B

Started by Mxzx

Pages1 2 3

Replies: 31
Views: 15,700

February 12, 2014, 06:32:21 PM
by El Chiguete

No Power, No Display, No Output

Started by Chip Roberts

Pages1 2 3

Replies: 38
Views: 17,052

December 23, 2017, 08:35:04 AM
by MarshallJMP

MP-1 got Noisy...

Started by rabidgerry

Pages1 2 3

Replies: 34
Views: 17,322

July 02, 2017, 04:53:43 PM
by MarshallJMP