Motherboard diagnosis is elimination

Motherboards are rarely the first culprit. Before condemning the board, eliminate PSU, RAM, GPU, and CPU as causes. Most "dead motherboard" diagnoses are actually PSU or RAM failures.

Elimination process

  1. PSU paperclip test — confirm PSU delivers power.
  2. Minimal boot — CPU, one RAM stick, no GPU (use integrated if available), no drives.
  3. Test each RAM stick individually in each slot.
  4. Test a known-good PSU.
  5. Test a known-good GPU.

Signs the motherboard itself is the issue

  • POST codes cycle or show specific motherboard error codes
  • Burnt smell or visibly damaged capacitors (bulging tops)
  • Multiple USB or PCIe slots stop working
  • System works but random lanes drop (NVMe disappears, USB stops)

Capacitor replacement

Swollen or leaking capacitors near the CPU VRM are a repairable fault for someone with soldering skills. Replacement capacitors cost cents; the repair saves the board.