post
That would be during the POST (Power-On Self Test)
if clicking but not starting dead battery if it starts it's one of the many relays that open and close during startup
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
failure
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.
Your battery does not supply electrical power to the vehicle it simply stores it. The alternator is what recharges (replenishes) the power used during cranking. You need to have your charging system checked to verify the alternator is working and at the same time you need to have the battery diagnosed as draining your battery completely repeatedly can cause premature failure.
During battery discharge, the species that is oxidized is the anode.
Dash lights are supposed to light at startup so you know they work. The 4x4 is not working so the light won't come on other than at startup.