Repairing a tricky L2 cache issue of a SOYO 4SAW2 486 Motherboard

We are repairing a damaged SY-4SAW2 late 486 motherboard based on the SiS 85C496 chipset, with leaky battery damage, missing/damaged components and broken keyboard connector. The missing components were next to the SC464 PLL. The PC was hanging during the external (L2) cache detection.

TheRetroWeb: https://theretroweb.com/motherboards/...

Atheatos Channel:
Mods:    • SIS 486 M/B SY-4SAW2. 4 + 1 MODS. Now...  
Over/Under Clocking:    • Over/Underclocking the Am5x86 (AMD 48...  

Music:
- Stalker from the Duke Duke Dance Party Album
- Kiz Urazgubi and Battle Cruiser from Quest V Reorchestrated and Remixed
by the Space Quest Historian, Troels Pleimert https://spacequesthistorian.bandcamp.com
Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0) https://creativecommons.org/licenses/...

Intro Music: "Unreal Super Hero 3" by Kenet & Rez :    • "Unreal Super Hero 3" by Kenet & Rez