Update your post with full system hardware specs and OS information.
What was the "similar" problem and how does the current led light behavior differ from that?
What are you using, if anything, to control the fan led lights?
The key is to identify what is the expected behavior.....
Ok
My system specs:
OS: Windows 10 pro 64-bit
CPU: Intel Core i7 7700@ 3.60GHz
Kaby Lake 14nm Technology
Ram 16.0 GB Dual-Channel @ 1063MHz
Motherboard: Supermicro C7H270-CG-ML(CPU)
Graphics
ViewSonic XG2401(1920X1080@144Hz)
4095MB NVIDIA Geforce GTX 1050 Ti(ZOTAC INTERNATIONAL)
Storage
1863GB SEAGATE ST2000Dm006-2DM164(SATA)
1863GB TOSHIBA External USB 3.0 USB Device(USB(SATA))
Optical Drives
Asus DRW-24D5MT
AUDIO
Realtek High Definition Audio
The PSU I have now is Seasonic 850PX Focus+ 80 platinum rating. The older one was Corsair VS650. When I used the older one, the PC fan led would glow for one second after it has been turned off but that happened randomly and after that nothing else happens. And I've not done anything to control the fans on the PC at all.