UserDiag allows you to get detailed information about a device and test its components.
You can check if your computer is working properly and get advice if any problems are identified.
The power-on process moves through several distinct states, often following ACPI standards from to S0 (Working State) . 1. Pre-Trigger / Standby Phase (G3 to S5)
: The SIO sends this 3.3V high-level signal to the PCH to notify it that standby power is stable and the system is ready to be "resumed". 2. Triggering Phase (Power Button Event) desktop motherboard power sequence pdf exclusive
: The CMOS battery provides voltage to the Southbridge/PCH to maintain the Real-Time Clock (RTC). The power-on process moves through several distinct states,
The is a highly structured, step-by-step process that ensures all components—from the chipset to the CPU—receive stable power in the correct order to prevent hardware damage and ensure a successful boot. Understanding this sequence is essential for diagnosing "no power" or "no display" issues. Core Stages of the Power Sequence Understanding this sequence is essential for diagnosing "no
Before the power button is even pressed, the motherboard must establish baseline voltages to listen for a wake signal.
This phase initiates the transition from a "Soft Off" (S5) state toward full operation. Desktop Motherboard Power Sequence Explained - Scribd
Using UserDiag is simple and no installation is required.
Launch the tool, choose one of the three diagnostics and UserDiag do the rest.
Various computer components are then tested. Useful information for diagnosis regarding software and hardware configuration is collected.
Once completed, UserDiag exports a comprehensive report on the computer's health, with advice and solutions if any problems have been identified.
This is my PC :)
Example of an automatic report analysis by UserDiag
The report consists of three sections.
The first contains the self-analysis of the report by UserDiag, with advice to resolve identified issues.
The second groups together information such as software configuration and computer components.
The third part offers graphs recorded during the various tests. This allows detailed analysis of metrics such as temperature, frequencies, voltages, or component consumption.
UserDiag uses real-time monitoring technologies provided by HWiNFO.
This integration allows accurate and reliable readings of frequencies, temperatures, voltages, and other metrics.
Other specialized tools are also used during component tests, such as FurMark (graphics card), Prime95 (processor), or diskspd (storage).
This is done with the permission of their developers or via their license. Thank you!
If you have any questions, feel free to check the FAQ or the documentation.
Enjoy with it!
