That would be during the POST (Power-On Self Test)
post
if clicking but not starting dead battery if it starts it's one of the many relays that open and close during startup
If the CMOS battery is discharged, the computer will lose its ability to retain BIOS settings, including system time and date, boot order, and hardware configuration. This can lead to errors during startup, such as incorrect time displays or failure to recognize hardware components. Users may need to reset the BIOS settings manually whenever the computer is powered off. In some cases, the system may fail to boot properly until the battery is replaced.
Battery are very good source of DC Supply it has following properties 1- No ripples 2- No line regulation 3- storage(it can be used during power failure).
Battery Park (on Manhatten Island, New York) reported 13.88 feet of surge.
if hdd is not connected properly, then during the startup, it will show a msg "Disk boot failure" or "No bootable devices found" and the system would not find any files to load the OS in the RAM
F8
BIOS
Your furnace may make a buzzing noise during startup due to a faulty motor or a loose component. It is important to have a professional inspect and repair the furnace to prevent further damage.
To fix startup issues on an HP Pavilion dv6, first, try performing a hard reset by turning off the laptop, removing the battery and power adapter, and holding the power button for 15 seconds before reconnecting everything. If that doesn't work, access the BIOS by pressing F10 during startup and check if the boot order is correct. You can also run the built-in HP diagnostics by pressing F2 or F11 at startup to identify hardware problems. If the issue persists, consider using recovery options or reinstalling the operating system.
failure
In HVAC systems, a device that reduces a compressor's load on startup is a "soft starter." A soft starter gradually ramps up the voltage and current supplied to the compressor, minimizing the inrush current and mechanical stress during startup. This helps to prevent damage to the compressor and associated components, leading to improved efficiency and longevity of the system. Additionally, it can reduce the overall energy consumption during startup.