Copied to GitHub repository for posterity.

Source URLs of accompanying web pages and photos:

* Captured 2020-08-01: https://en.wikipedia.org/wiki/Macintosh_SE/30
* Captured 2020-08-01: https://upload.wikimedia.org/wikipedia/en/7/70/Macintosh_SE30_Mainboard.jpg
* Captured 2020-08-01: http://www.toughdev.com/content/2017/01/repairing-a-vintage-macintosh-se30/
* Captured 2020-08-01: http://i2.wp.com/www.toughdev.com/content/wp-content/uploads/2017/03/IMG_3880_Mac_SE_30_Motherboard.jpg
* Captured 2020-08-01: https://www.reddit.com/r/VintageApple/comments/6734bw/mac_se30_logic_board_restore_complete/
* Captured 2020-08-01: https://i.imgur.com/SCsjocK.jpg
* Captured 2020-08-01: https://web.archive.org/web/20200801203154/https://68kmla.org/forums/index.php?app=forums&module=forums&controller=topic&id=29384
* Captured 2020-08-01: https://web.archive.org/web/20200801203336/https://68kmla.org/forums/uploads/monthly_01_2017/post-6609-0-26113900-1484603908.jpg
* Captured 2020-08-01: https://retrocomputing.stackexchange.com/questions/1738/how-does-the-mac-se-30-send-video-to-the-analog-board
* Captured 2020-08-01: https://i.stack.imgur.com/wMsyQ.png

Another useful site, but only contains low-resolution photos:

* Visited 2020-08-01: https://pc-restorer.com/repairing-a-macintosh-se30-with-no-sound/