Lisa Troubleshooting and Repair

Twiggy drive head pressure

Started by stepleton

Replies: 3
Views: 54,573

February 19, 2025, 11:14:51 PM
by ried

No startup - Lisa Power Supply Unit?

Started by Ona Beach

Replies: 4
Views: 56,553

April 24, 2024, 10:43:24 PM
by AlexTheCat123

Lisa 2/10 230V PSU jumper settings

Started by Insanely Digital

Replies: 5
Views: 56,659

January 28, 2024, 06:01:39 AM
by Insanely Digital

DataPower 1.8A PSUs: SG3524 regulator IC failing

Started by stepleton

Replies: 5
Views: 56,696

November 02, 2023, 05:53:38 PM
by nekonoko

CRT Ground wire fragility

Started by Andrew

Replies: 5
Views: 56,914

December 30, 2023, 06:10:10 PM
by Andrew

Replacing a broken yellow cam on a Lisa expansion card ZIF socket with 3D print

Started by sigma7

Replies: 2
Views: 57,308

June 30, 2025, 02:59:33 PM
by sigma7

Video checkerboard pattern

Started by nickpunt

Replies: 3
Views: 58,769

April 02, 2025, 03:09:08 PM
by sigma7

Lisa 1 (2/5) Parallel port interfering with Mouse tracking?

Started by ried

Replies: 5
Views: 59,145

November 12, 2024, 11:49:30 AM
by ried

Misc Lisa peripherals repairs

Started by pintoguy

Replies: 4
Views: 59,262

July 14, 2022, 05:31:54 PM
by pintoguy

Sun Remarketing Lisa Questions

Started by ried

Replies: 5
Views: 59,659

June 13, 2023, 12:51:49 PM
by pintoguy

How to reach the CPU card for testing?

Started by fri0701

Replies: 6
Views: 60,543

December 29, 2023, 12:13:39 PM
by AlexTheCat123

Sun disk controller schematic

Started by Al Kossow

Replies: 5
Views: 60,631

April 30, 2023, 08:35:03 PM
by sigma7

Another cautionary tale... a missing card stop brought down my machine

Started by ried

Replies: 2
Views: 62,105

October 05, 2025, 02:18:04 PM
by AlexTheCat123

File System Issues.

Started by bmwcyclist

Replies: 3
Views: 62,822

May 23, 2025, 02:49:36 PM
by bmwcyclist

Troubleshooting Bus Errors

Started by sigma7

Replies: 3
Views: 62,949

May 14, 2022, 05:21:38 PM
by sigma7

CPU board versions and revisions?

Started by bmwcyclist

Replies: 0
Views: 63,120

March 23, 2025, 06:45:06 PM
by bmwcyclist

Lisa cursor blinks rapidly, each keystroke prints multipe symbols on screen, why

Started by TorZidan

Replies: 5
Views: 65,285

October 27, 2024, 12:28:48 AM
by sigma7

Issues with 800K drive motor control

Started by Andrew

Replies: 6
Views: 65,329

February 28, 2024, 12:15:46 PM
by Andrew

Widget Issues

Started by jamesdenton

Replies: 2
Views: 65,507

March 05, 2021, 03:09:56 PM
by patrick

Any way to get your hands on a replacement for I/O board RP3?

Started by stepleton

Replies: 7
Views: 65,986

October 04, 2022, 04:22:25 PM
by stepleton