F5F Stay Refreshed Hardware Desktop PC fails to show output and repeatedly cycles through debug LEDs on the motherboard

PC fails to show output and repeatedly cycles through debug LEDs on the motherboard

PC fails to show output and repeatedly cycles through debug LEDs on the motherboard

P
ProVideo
Junior Member
2
10-06-2021, 03:19 PM
#1
My machine has functioned well for several months until it suddenly stopped showing anything. I suspect a hardware problem since the computer won’t power on at all. When I power it up, all indicators and fans operate normally but never initiate a boot. It repeatedly cycles through debug lights on the motherboard—CPU, DRAM, VGA—and then usually restarts at the CPU, though sometimes it manages to boot but still lacks a display. After a restart, there’s a noticeable drop in the sound of the computer starting, possibly fans slowing down even though they appear intact. I’m unsure if this is related to a particular part, as my setup seems new with an updated BIOS and all components brand new. I’d appreciate your assistance. My actions so far: tested RAM sticks (no change), checked monitor and HDMI cable with another device (functioned), disconnected power and restarted (no effect), removed motherboard power for a while (possibly cleared CMOS, unsure), verified PCIe cables from the GPU (difference noticed), system details: AMD Ryzen 5 5600X 3.7 GHz, 6-core, Asus ROG STRIX B550-A, Gigabyte GeForce RTX 3070 Ti 8 GB Vision OC, Corsair RM 850W power supply.
P
ProVideo
10-06-2021, 03:19 PM #1

My machine has functioned well for several months until it suddenly stopped showing anything. I suspect a hardware problem since the computer won’t power on at all. When I power it up, all indicators and fans operate normally but never initiate a boot. It repeatedly cycles through debug lights on the motherboard—CPU, DRAM, VGA—and then usually restarts at the CPU, though sometimes it manages to boot but still lacks a display. After a restart, there’s a noticeable drop in the sound of the computer starting, possibly fans slowing down even though they appear intact. I’m unsure if this is related to a particular part, as my setup seems new with an updated BIOS and all components brand new. I’d appreciate your assistance. My actions so far: tested RAM sticks (no change), checked monitor and HDMI cable with another device (functioned), disconnected power and restarted (no effect), removed motherboard power for a while (possibly cleared CMOS, unsure), verified PCIe cables from the GPU (difference noticed), system details: AMD Ryzen 5 5600X 3.7 GHz, 6-core, Asus ROG STRIX B550-A, Gigabyte GeForce RTX 3070 Ti 8 GB Vision OC, Corsair RM 850W power supply.