Hello, this is my first post on here and my first time asking a troubleshooting question in general, so sorry in advance if I don't fully explain things right off.
Here's what's going on currently:
When I turn on my PC, the fans whirl up and I can hear the HDD going, can hear the DVD drive starting up, and that's it. Nothing on the display, the monitor just keeps saying "No Signal."
What I noticed leading up to this:
A couple weeks ago I had to restart the PC due to an update, I got the same problem as explained above but eventually after turning the PC off and on so many times it booted up and displayed just fine. The very next time I had to reboot the problem above happened again and even a week later it still won't display anything.
Here's what I've tried so far:
Removing all components other than the Mobo and CPU one at a time (With and without swapping back to the original power supply).
Removing every piece of hardware not necessary to get into the BIOS (kept power supply, mobo, cpu, one stick of RAM and changed throughout my 4 sticks to try each one individually), I tried this with both the original power supply and the corsair.
Clearing the CMOS, both with jumper and by unplugging everything and removing the battery for an hour.
Different HDMI cables, different monitors.
When it booted before and displayed I ran Malwarebytes and nothing was found (at all). The PC had very little use between that and the next reboot where it stopped displaying altogether.
I see no bloated capacitors at all, the CPU doesn't look bulged in any way.
My question(s): Is it safe to say at this point that the problem is the MoBo, CPU, or both? Are there still other things to try? Am I missing something obvious? What mobo and cpu (and possibly ram) would you recommend for a budget of $300 to $400 (US), keeping in mind I care about longevity more than raw power (my son mostly plays TF2, it doesn't need to amaze, just last). I won't buy AMD.