Troubleshooting An IBM PC 5150 - Down The Rabbit Hole We Go!

I nearly gave up on this IBM PC 5150 motherboard repair effort after working on it for a week or so. This is the first in a repair-a-thon/salvage-a-thon series I am doing on a bunch of early IBM PCs I found at e-waste. Early IBM PC Repair Series Part 1 -    • Troubleshooting An IBM PC 5150 - Down The ...   Part 2 -    • Rare Video Card Found Inside An Original I...   Part 3 - Coming soon Part 4 - Coming soon Part 5 - Coming soon Be sure to subscribe to my second channel    / @retrohackshackafterhours   This site contains affiliate links for which I may be compensated with no extra charge for you. Thank you for supporting the channel! TOMLOV Microscope I used in the video US: https://amzn.to/3DtSWbC UK: https://amzn.to/41Ivz7r Chapters: 00:00 - First Look 03:19 - Identifying Board And Chips 09:31 - Checking For Shorts 11:50 - Setting Switches 15:26 - First Test 18:17 - Variable Capacitor Problem 19:47 - Bad Socket Connections 21:05 - Probing Signals w/ Oscilloscope 29:12 - RUUD's Diagnostic ROM 34:17 - Desoldering Chips 42:42 - Troubleshooting RAM Signals 46:18 - Retro Chip Tester Pro Problems 51:31 - Troubleshooting Bad Traces 56:34 - Final Tests And Games Music used by permission: “Fakebit World” by Malmen   / malmen   "The Dream Is Always The Same" by State Azure @stateazure Other music from the YouTube Audio Library Support me on Patreon -   / retrohackshack   Website - https://retrohackshack.com Instagram -   / retrohackshack   Mastodon - https://mastodon.social/@retrohackshack Twitter -   / retrohackshack   Tools I Use - https://retrohackshack.com/tools/ T-shirts, Books and more - https://retrohackshack.com/shop/ Ebay Store - https://www.ebay.com/str/retrohackshack #Retro #Computers