How To Test A Power Supply Unit (PSU) With A Digital Multimeter | Advanced Troubleshooting

In this youtube video tutorial I show you how to test a psu with a multimeter or how to test a power supply unit using a digital multimeter. This is an advanced troubleshoot tutorial. There is a paper clip test you can do to check if a power supply is dead or not. However that test only checks for power but not for correct voltage.

First you need to test for AC Voltage coming from the mains plug. Next you need to test for DC voltage from each of the pin on the power supply unit.

Standard ATX 12V power supply units can be either 20 pins or 24 (20+4) pins. The method is the same for each.

This video is also a stand alone tutorial as part of a longer Troubleshoot series, see details in the video and below.

Time Stamps:

00:36 Troubleshoot Series Intro | Desktop Pc Computer Not Turning On No Display | How A Computer Works
youtube.com/watch?v=Wkcx-x9gjkg

00:44 Test A Laptop Charger Adaptor With A Digital Multimeter
youtube.com/watch?v=-jbD2bXtZqU

00:50 Troubleshoot A Dead Computer Pc No Power - Desktop PC Computer Not Turning On At All Easy Fix Repair
youtube.com/watch?v=cbYdMIgMlOo

00:55 The paper clip test

001:43 Power Supply Unit Replacement Under 2 minutes Challenge
youtube.com/watch?v=cQqCkIuUEd8

01:55 Mastech Digital Multimeter MS8268
Amazon Affiliate UK: amzn.to/2y5xnXC
Amazon Affiliate US: amzn.to/2xa7ng8

02:53 UK AC Voltage Range: 216.2 to 253V
nottingham.ac.uk/etc/guide-voltageoptimisation.…

03:02 Tolerance of -6% to +10%

04:42 Turn a Computer Power Supply into Bench Power by Jason Poel Smith
makezine.com/projects/computer-power-supply-to-…

06:00 Laptop No Display Black Screen Blank Screen On Startup | Best Guide How To Fix Troubleshoot Repair
youtube.com/watch?v=E60VjaeNnP4

07:26 DC Volt Tolerance

Red/Purple: 5V +/- 4% = 4.8 to 5.2 V

Yellow/Blue: 12V +/- 4% = 11.52 to 12.48
Orange: 3.3V +/- 4% = 3.168 to 3.432

10:18 How To Take Out Or Remove A Motherboard From A Desktop Computer Case | Breadboarding Easy Mode
youtube.com/watch?v=UM-9wAUQCdU

Affiliate Product Links:

Canon EOS 1300D UK: amzn.to/2h8SZvw
Canon EOS 1300D US: amzn.to/2xplQW1

Boya BY M1 Lavalier Microphone UK: amzn.to/2xHslo4
Boya BY M1 Lavalier Microphone US: amzn.to/2y4Ydze

Zoom H1 Recorder UK: amzn.to/2w14L0W
Zoom H1 Recorder US: amzn.to/2xGyqkB

Mastech Digital Multimeter MS8268 UK: amzn.to/2y5xnXC
Mastech Digital Multimeter MS8268 US: amzn.to/2xa7ng8

HealMyTech Custom Amazon Affiliate Links:

UK Amazon Affiliate link: amazon.co.uk/?tag=healmytech-21

US Amazon Affiliate link: amazon.com/?tag=healmytech-20

Subscribe to my channel: HealMyTech
youtube.com/c/healmypc99

Connect with me:
Email: [email protected]
Twitter: @healmytech
Facebook: facebook.com/Healmytech-1739142406338235/

Thanks for watching!
Don't Click This! youtube.com/channel/UCCN6jhE-nqsfmp1GYazd2wA?su…