I assembled the pc last week. I connected every component and then turned on the system. The system turned on. Motherboard was showing lights and CPU and system fans were working fine. But after 20 seconds it shut itself down and restarted. This cycle continued infinitely. I then removed everything but CPU from the motherboard and the same thing happened. I replaced my motherboard and connected CPU and RAM only but still the system shuts down after 20 seconds and restarts before reaching the bios. I will be posting the pictures in the evening when I reach home. My complete specs for the system are:
i5 6500
Gigabyte B150m D3h
Antec VP 450w
Corsair Vengeance LPX 8gb
zotac 1060 6gb mini
Wd blue hard disk
corsair spec-03 case
Did you assemble the whole system yourself or any technician did?
Steps to be followed:
1. Replace the CMOS battery on the motherboard with a new sealed one, then set everything to defaults and save and reboot,
2. Remove the RAM and try to boot, If it boots by emitting 5 beeps then RAM is good,
3. Remove the processor again and apply some thermal paste and reseat it and boot, Just check whether the CPU heatsink fan is working as it should,
4. Remove the GPU and boot without it,
5. In the BIOS, there will a setting for using the discrete GPU as your main GPU, check it and set it,
6. Remove the PSU and reconnect all,
Check whether you connected the EPS 6pin power connector behind the processor.
7. Download the latest BIOS update for Gigabyte B150M-D3H from Gigabyte.in and update the BIOS to the latest update.
If all steps fail to start up the system, then you need to send the Processor, Motherboard & RAM for RMA.
Just complete all the above steps & tell me here what has happened.
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