vswitchzero | Repairing the FIC 4386-VC-HD Hybrid 486/386 Motherboard! @vswitchzero | Uploaded April 2022 | Updated October 2024, 25 minutes ago.
Is it a 486 or a 386 board? It's both! Today I'll be repairing a damaged 486/386 hybrid board. This is the FIC 4386-VC-HD motherboard that I bought as-is on eBay. After a repair attempt gone wrong by the previous owner, several components will need to be replaced.

Necroware's open source Benchmarq RTC modules:
github.com/necroware/nwX287

Here's my video on RTC modules and my experience constructing the nwX287:
youtu.be/XA8YFiDVbCM


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00:00 Introduction
01:05 A Look at the Board
03:25 The Damage
05:44 A Special Mention
06:30 The Plan and the Tools
10:21 Desoldering the DS1287
11:28 Desoldering the Capacitor
12:31 Replacing the Capacitor
14:05 Installing the Socket and RTC
15:57 The Moment of Truth
16:30 Troubleshooting
17:43 Success and Conclusion