Why is this keyboard not working? Find the fault on the ABIT BE6 II

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Published on February 6, 2025 1:01:04 PM ● Video Link: https://www.youtube.com/watch?v=l-_IwLbolEc

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This is a follow-up to the ABIT BE6 II motherboard which I recently found at the scrapyard. Unfortunately, the keyboard doesn't work reliably. Today, we are going to look for clues why the keyboard seems to restart randomly.

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▬▬▬▬ Timestamps ▬▬▬▬▬▬▬▬▬▬▬▬▬▬
00:00 The keyboard issue
00:54 Looking at some chips
04:01 PS/2 keyboard connector
04:50 Tracing ground and power
06:26 Checking clock and data signal
10:36 Tracing clock and data signal
12:38 Winbond chip reflow
18:52 Winbond's little brother
24:37 Looking for clues
27:04 The loose connection
27:38 Behind the keyboard connector
36:34 Another problem
37:50 The final test
38:29 Recap