LOGI PC88XT motherboard — resurrection log

As promised in the “Bought these (retro) hardware today” thread, here’s a dedicated log for bringing a LOGI PC88XT motherboard back to life.
This is the second board from a lot that was sold as non-working / for parts. It carries marks from a previous (apparently unsuccessful) repair. I’ll post diagnosis and repair progress here.

Board description

• Model: LOGI PC88XT
• Chipset: IBM PC/XT-compatible
• CPU: not installed
• FPU: not installed
• ISA slots: 8 × 8-bit
• RAM: up to 640 KB, DIP-16
• BIOS: not installed

Initial inspection

• Damaged traces/pads near the PSU connector
• Evidence of previous repair work
• Bent pins
• C16: missing tantalum capacitor on the +5 V rail

What’s been done so far

• Removed old capacitors
• Cleaned the affected area
• Checked all pads and nearby traces for continuity and lift
• Repaired broken signal/data traces and reinforced any suspicious runs (0.2 mm copper jumpers are used only on signals)
• Traced the primary PSU rails to confirm correct continuity of +5 V, ±12 V, −5 V, GND, and Power-Good

Conclusion

The board has clearly seen better days and shows signs of an unsuccessful past repair, but I’m going to try to bring it back. I started with the obvious: severed traces are restored, questionable ones reinforced, and I’ll reuse the alternative capacitor pads that are in better shape. Next step is to install replacement capacitors, source a CPU, and choose a suitable BIOS (I’ll probably begin with a diagnostic ROM) for the first power-up.
I’ll keep this thread updated.