A +12V reading between 11. Testing the standby +5VSB (purple wire) while the supply is on is also useful, as it should maintain voltage even when the PC is off.
Verifying Power Supply Voltage Readings Accuracy with a Multimeter
Repeat this process for the +5V (red wire) and +3. You will also require a paperclip or a dedicated paperclip adapter to bridge the green PS_ON pin to a black ground pin on the 24-pin ATX connector.
Look for any bulging or leaking capacitors on the circuit board, which are a clear indicator of imminent failure. If any rail reads significantly high or low, or fluctuates wildly under load, the power supply is failing.
Verifying Power Supply Voltage Readings Accuracy with a Multimeter
The +12V rail is usually the most critical, as it powers the CPU and GPU, while the +5V and +3. Final Load Test and Conclusion To validate the results further, you should simulate a load by plugging in high-power devices like a DVD drive or a printer into the supply.
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