Troubleshooting Problems

Fixing-up any old gear

Started by vansinn

Pages1 2

Replies: 15
Views: 14,744

February 15, 2017, 10:27:25 AM
by DannyjoeCarter

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

Started by Bret

Replies: 5
Views: 8,493

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

LED Issue MP1

Started by Mojave

Replies: 4
Views: 4,252

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

ADA mp1 - Solid States works only

Started by gg85

Pages1 2 3

Replies: 31
Views: 3,752

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

MP1 Classic Err 7

Started by leninvargas

Replies: 6
Views: 4,786

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

MP-1 full refurb and restoration

Started by Systematic Chaos

Replies: 4
Views: 2,302

November 23, 2022, 07:09:05 AM
by MarshallJMP

V1.38 gain drop/loss just seconds after startup / warmup (solved)

Started by Systematic Chaos

Replies: 11
Views: 2,228

October 28, 2022, 07:26:03 PM
by rnolan

MP-1 v.2 Not editable equalizer.

Started by RVLP

Pages1 2

Replies: 15
Views: 8,605

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

No Edit Function after replacing battery and eprom

Started by potus2028

Replies: 1
Views: 1,371

October 14, 2022, 09:30:47 PM
by rnolan

Solid State Clean Gets Nasty

Started by Moff40

Replies: 5
Views: 1,625

August 29, 2022, 09:34:51 PM
by Moff40

MP1 - Developed very loud hum on tube settings

Started by MR THUD

Replies: 8
Views: 2,396

August 29, 2022, 11:38:14 AM
by MarshallJMP

MP1 No Output, "Magic Smoke" smell

Started by Hambone

Replies: 7
Views: 1,810

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

ADA MP1 - Tube Board Problem and Resolution.

Started by MR THUD

Replies: 2
Views: 2,401

November 12, 2021, 09:19:51 AM
by MarshallJMP

Fixed: MP-1 with ALL clip leds lit solid and NO sound (long post)

Started by Pork_Chop

Replies: 2
Views: 1,791

November 12, 2021, 09:17:43 AM
by MarshallJMP

MP1 1.38 - Is my Chorus failing???

Started by skarkowtsky

Replies: 11
Views: 2,881

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

MP-1 no display or LED's

Started by andtimebegins

Pages1 2 3 ... 5

Replies: 70
Views: 10,853

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

Dialing Down on Signal Cut

Started by Chip Roberts

Replies: 3
Views: 2,117

January 22, 2021, 05:54:36 PM
by Harley Hexxe

MP-1 MIDI not working

Started by niksa

Replies: 11
Views: 7,460

January 10, 2021, 06:30:02 AM
by MarshallJMP

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

Started by Pedro

Replies: 14
Views: 3,720

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

MP1 V2 (no top switch) All original excluding battery mod

Started by ScottGray

Pages1 2

Replies: 26
Views: 5,308

October 18, 2020, 11:03:11 AM
by MarshallJMP