How to Diagnose Power Supply Failure

0:00 How to Diagnose Power Supply Failure?
0:06 The following situations may cause this issue
0:08 Case 1: The LED on the power supply does not light up
0:10 Case 2: Amp/Preamp does not turn on
0:12 Case 3: When plugged into the Amp, both light on the amp & power supply start blinking
0:15 Case 4: Amp/Preamp make the noise
0:19 Case 5: Sound shuts off by itself
0:22 Possible solution
0:32 1. Check if the power supply is illuminated when plugged into to AC by itself
0:39 2. Plug power supply into different socket
0:41 3. Test the adapter with a meter
0:44 4. Try a different power supply (within a range of DC input
01:19 5. Test the included power supply on other electrical equipment