Posting here as all other attempts to solve the problem have failed:
My PC runs perfectly well when it does start, but on occasion will simply refuse to start after a full shutdown. I'll press the power button and all the lights and fans will turn on (even on peripherals like mouse, keyboard and speakers) and it will seem to go through the full startup sequence, but the monitors will remain dark even after unplugging and plugging back in display cables. It doesn't seem to do anything when I start typing or click. Even after forcing a shutdown by holding the power button, it will return to the same state after turning on again (same thing happens after soft resetting the system by unplugging the power supply, holding the power down for about 15 seconds and then reconnecting and turning back on). At this point I usually resort to opening up the case and removing some of the components, blowing off the contacts and then plugging them back in, which strangely usually results in it functioning (although I have no idea if this is due to my actions or simply because it has decided to work again) but nothing has worked permanently so far. The part that is making troubleshooting difficult is that doing this resolves the problem for a while, sometimes even for a whole week of consistent starts (and the fact that the computer runs absolutely fine when it is up), but then the problem will return again and I have to repeat the process.
Previous solution attempts:
Disconnecting power supply, holding power button down for about fifteen settings, reconnecting power supply.
Plugging power supply cable directly into wall outlet instead of power strip.
Changing wall outlets.
Disconnecting all peripherals except for one monitor.
Updating and then reinstalling all graphics drivers.
Reinstalling Windows 10.
Removing and swapping RAM sticks.
Swapping graphics card to different PCI slot.
Resetting the motherboard by taking the battery out and leaving for 30 minutes.
Disconnecting and reconnecting all power cables from power supply to components.
Swapping SSD SATA cable and port.
Taking apart and thoroughly cleaning all components and contacts with compressed air.
I do have a spare graphics card that I will try swapping out if/when the problem happens again.
System specifications:
My PC runs perfectly well when it does start, but on occasion will simply refuse to start after a full shutdown. I'll press the power button and all the lights and fans will turn on (even on peripherals like mouse, keyboard and speakers) and it will seem to go through the full startup sequence, but the monitors will remain dark even after unplugging and plugging back in display cables. It doesn't seem to do anything when I start typing or click. Even after forcing a shutdown by holding the power button, it will return to the same state after turning on again (same thing happens after soft resetting the system by unplugging the power supply, holding the power down for about 15 seconds and then reconnecting and turning back on). At this point I usually resort to opening up the case and removing some of the components, blowing off the contacts and then plugging them back in, which strangely usually results in it functioning (although I have no idea if this is due to my actions or simply because it has decided to work again) but nothing has worked permanently so far. The part that is making troubleshooting difficult is that doing this resolves the problem for a while, sometimes even for a whole week of consistent starts (and the fact that the computer runs absolutely fine when it is up), but then the problem will return again and I have to repeat the process.
Previous solution attempts:
Disconnecting power supply, holding power button down for about fifteen settings, reconnecting power supply.
Plugging power supply cable directly into wall outlet instead of power strip.
Changing wall outlets.
Disconnecting all peripherals except for one monitor.
Updating and then reinstalling all graphics drivers.
Reinstalling Windows 10.
Removing and swapping RAM sticks.
Swapping graphics card to different PCI slot.
Resetting the motherboard by taking the battery out and leaving for 30 minutes.
Disconnecting and reconnecting all power cables from power supply to components.
Swapping SSD SATA cable and port.
Taking apart and thoroughly cleaning all components and contacts with compressed air.
I do have a spare graphics card that I will try swapping out if/when the problem happens again.
System specifications:
