Prior to repairing the PC power supply unit, the following measures must be taken:
- Ensure the implementation of security measures (BP connected through an isolating transformer);
- Examine, if available, the concept of the BP, identify the main structural blocks, get acquainted with the design features;
- To determine the constructive placement of the main structural blocks of the BP.
- Make a plan (algorithm) for troubleshooting BP.
Figure 29 shows a general view of the troubleshooting algorithm in the PSU.
Figure 30-32 shows the search algorithms for the most common cases of power supply faults.
Algorithms for troubleshooting in PSU PC
Figure 29 - Troubleshooting algorithm in the PC power supply
Figure 30 - Troubleshooting algorithm in the PC power supply in cases where the output voltages do not differ from the nominal 
Figure 31 - Fault finding algorithm in the PC power supply, in case of absence of some output voltages 
Figure 32 - Algorithm of troubleshooting in the PC power supply, in the event of protection of the power supply and the absence of remote control of the PSU.
See also
- Secondary power supplies
- 3.2.5 FEATURES OF VM POWER SUPPLY DEVICE, REPAIR METHOD
- Computer power supply
- 3.1.3. TROUBLESHOOTING ALGORITHMS FOR PC POWER SUPPLY
- Diagnostics and Fault-Finding Algorithms for RAM, Motherboard, and CPU
- Faulty ports on the motherboard (COM LPT USB)
- Performance Diagnostics of the Motherboard, CPU, and RAM
- Structural and Functional Diagram of an Ultrasound Device, Diagnostics and Repair of the Ultrasound Machine and Its Probes
- Malfunctions of active and passive radio radio elements
- Диагностика неисправностей видеокарты и ремонт
- Find, diagnose and troubleshoot an ATA disk
- 3.1.4. MAIN MALFUNCTIONS OF THE SYSTEMBOARD, THEIR SIGNS, CAUSES AND ELIMINATION METHODS
- Fault-Finding Algorithm for TV Tuners, LCD Monitors, Televisions, TV Boxes, and Smart TVs
- 3.1.7. MALFUNCTIONS OF THE HARDWARE PART OF HDD THEIR CHARACTER OF MANIFESTATION, TECHNIQUE OF THEIR ELIMINATION
- Troubleshooting. Methods of troubleshooting As well as the reasons for the inoperability of electronic devices.
- Fault finding algorithm
- 3.1.3. TROUBLESHOOTING ALGORITHMS FOR PC POWER SUPPLY
- Development of a diagnostic and troubleshooting algorithm.
- 3.5. NETWORK EQUIPMENT TROUBLESHOOTING
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