Question PC turning on but no signal

[dammson]

Hello,
After not touching my PC for a year, I did a thorough cleaning and after running perfectly for 5 years, it gives no signal. USB ports also seem to not work, I have no power on my kb&m. It runs with no change in fan sounds and the DRAM led is orange. Similar posts suggested to clear CMOS and reseat everything but still no display. Anyone have any idea how to solve it?

Specs:
CPU: Intel Core i7-4790 @ 3.60GHz
CPU cooler: Intel E97378-001
Motherboard: Asus Z97A
Ram: 2x8GB Kingston KVR16N11/8 (1 now oof)
SSD/HDD: 500GB Samsung EVO 870 SSD & 1TB Seagate ST1000DM003
GPU: Sapphire Nitro+ RX580 8GB
PSU: Thunder 600W, more than 5yo
Chassis: CoolerMaster K380
OS: Windows 10
Monitor: LG 23MP57HQ-P
I'll update the post if I stumble across anything more (also, sorry if I posted this in the wrong subforum)

Here is the manual for the mobo if you need it.

Edit: So I kinda fixed it all by myself. While switching RAM slots I tried the RAMs one by one and turns out one of them is dead.

 

[Lutfij]

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model.

Since you have a processor with an iGPU, can you get display when you're working with the iGPU with the discrete GPU in the build?

 

[dammson]

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model.

Oh sorry, mb. Updating it now.

Since you have a processor with an iGPU, can you get display when you're working with the iGPU with the discrete GPU in the build?

It's working now, but I also didn't get anything when using the integrated one.