I recently bought a desktop and immediately upgraded it. I installed ram sticks and a graphics card. The PC seemed to be running perfectly for sometime up until one day when I just switched it off and it was completely unresponsive the next day. It didn't show any signs and I was constantly checking the temps to make sure it didn't overheat. Afterwards I tested the CPU, GPU, PSU, RAM and even the HDD and they were all working. Now I don't understand what the problem might be coz the motherboard light switches on which means it is getting power but when I push the power button there's no response. What might be the problem?
Edit:
CPU: E7500
Motherboard: Not sure but it's not a fancy motherboard
Ram: 8gb ddr3 1333mhz
HDD: WD 1TB
GPU: GT 730 2gb ddr3 128bit
PSU: Corsair VS450 450w
OS: Win 10 Home
Forgot to say I didn't use it for demanding tasks it was mostly used for storing data, watching videos and low-demanding games
Edit:
CPU: E7500
Motherboard: Not sure but it's not a fancy motherboard
Ram: 8gb ddr3 1333mhz
HDD: WD 1TB
GPU: GT 730 2gb ddr3 128bit
PSU: Corsair VS450 450w
OS: Win 10 Home
Forgot to say I didn't use it for demanding tasks it was mostly used for storing data, watching videos and low-demanding games
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