|Nice to see a well written post describing your issues, I'm suprised no one responded to you yet, but, sometimes a good description of the problem doesn't help in diagnosing FREEZING systems. |
Yes RED flag with the motherboard replacement & box I'd say.
It does sound like hardware issue(s), though, don't rule out malware. Make sure your system is clean. I'd run 2-3 anti-malware tools, MalwareBytes, Emsisoft anti-malware, SpyBot S&D, Anti-Root Kits like GMER, Radix, RootKit Revealer etc.
When systems freeze, I think of three things: 1. Diagnostics, 2. Diagnostics, 3. Diagnostics. There's no way to tell what's going on w/o making sure all your system settings are correct in BIOS and OS, correct & updated drivers installed, as well as making sure your system is clean of malware etc. If those are all OK, I'd test everything:
- Optical ROMS.
- Are there any firmware updates for HDDs, Optical drives, Video cards etc.
- Make sure motherboard is correctly mounted in the case.
- Check motherboard for any bulging capacitors.
- Make sure the RAM modules and Add-In cards are fully seated in their slots, and that the slots themselves look clean and undamaged.
- Look for loose or cracked data & power connection cables (I once found a loose power wire in a MOLEX connector on a flaky system).
- Look for loose, dry (ungreased) CPU/Heatsink.
- Look for noisy or hard to turn fans which indicate bad bearings.
- Is the system clear of ALL dust & debris?
- Does it Freeze in Safe Mode? A system that freezes in Safe Mode is fairly rare.
The last PC that I saw freeze , and by freeze I mean it freezes while in the OS, was a P4 single Core CPU, XP system w/ an Intel board. The whole CPU/heatsink/fan assembly was a tad loose from the motherboard and wasn't fully seated down into the CPU Heat sink snap downs on the motherboard. I'm assuming it was the ahem, "technician" who looked at her system prior to me. He also installed the main case fan backwards.
Never ASSUME anything.
Just another stupid saying...