Fault diagnosis
Answer a few questions to narrow down the cause. The steps follow the order technicians actually use: rule things out from the outside in, from cheap to expensive.
What to do
The PSU is undersized or there is a short
- The PSU may be too small for the load — check with the power calculator tool
- Remove expansion cards and drives, re-adding them one at a time to find what causes the drop
- If PoE feeds cameras, try unplugging the cameras — PoE draws a lot of power
Before opening the machine. Disconnect power, wait for capacitors to discharge, and photograph the current wiring. If the machine is under warranty, call us first — opening it yourself may void the warranty.