Troubleshooting Problems

Fixing-up any old gear

Started by vansinn

Pages1 2

Replies: 15
Views: 13,820

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

No Edit Function after replacing battery and eprom

Started by potus2028

Replies: 1
Views: 1,062

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

Solid State Clean Gets Nasty

Started by Moff40

Replies: 5
Views: 1,340

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

MP1 No Output, "Magic Smoke" smell

Started by Hambone

Replies: 7
Views: 1,496

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

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

Started by Pork_Chop

Replies: 2
Views: 1,529

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

Dialing Down on Signal Cut

Started by Chip Roberts

Replies: 3
Views: 1,833

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

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

Started by Systematic Chaos

Replies: 11
Views: 1,887

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

MP-1 full refurb and restoration

Started by Systematic Chaos

Replies: 4
Views: 1,954

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

Srange Chorus problem

Started by Pete66

Replies: 2
Views: 1,964

September 26, 2020, 12:43:27 AM
by Pete66

MP1 - Developed very loud hum on tube settings

Started by MR THUD

Replies: 8
Views: 2,071

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

ADA MP1 - Tube Board Problem and Resolution.

Started by MR THUD

Replies: 2
Views: 2,151

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

no sound on outputs A and B, effects loop works

Started by ang3lus

Replies: 4
Views: 2,367

April 15, 2020, 01:27:32 AM
by rnolan

MP1 1.38 - Is my Chorus failing???

Started by skarkowtsky

Replies: 11
Views: 2,530

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

MP1 wont work with either 2.0 or 2.01 EPROM

Started by rnolan

Replies: 3
Views: 2,759

June 15, 2019, 08:48:09 AM
by MarshallJMP

New Member - just got an old MP-1 - no sound - it does turn on

Started by Overtone85

Replies: 1
Views: 2,825

October 30, 2018, 01:03:45 PM
by MarshallJMP

B200s hum

Started by duecemfhatchet

Replies: 3
Views: 2,839

August 20, 2019, 09:24:04 AM
by MarshallJMP

ADA mp1 - Solid States works only

Started by gg85

Pages1 2 3

Replies: 31
Views: 2,919

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

MOVED: Techniques and tooling

Started by rnolan

Replies: 0
Views: 2,961

April 16, 2016, 05:00:51 AM
by rnolan

ADA MP-1 Ground hum with good gain

Started by bunkyloo

Replies: 3
Views: 2,990

November 10, 2018, 02:50:27 AM
by MarshallJMP

MP2 starts out quiet but gets gradually more noisey

Started by h.e.l.shane

Replies: 0
Views: 3,168

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