Member Avatar for RegalHawk

Please, please, please help me. My new computer is having a very strange problem ever since i put on easy tune pro 5.0 and nVIDIA nTUNE on it. I put these on it because i was getting strange flashes of white across the screen when i was playing games, which ultimately kept crashing my games when i was playing the games. So i thought it might be a graphics card problem (i have a nVIDIA GeForce 7800 GT). After i got these i went on them had a snoop around them and then when i went onto Easy tune and some weird thing said motherboard fan going into cruise mode - you must restart computer i so i exited that pop-up and then i went to bed. the next morning i turn it on and it freezes at the logon screen. so i restart the computer and it does the same at the windows bootup display. So i am getting confused and i restart it again goes to the very first gigabyte logo (i have a GA-8N-SLI PRO motherboard) and it freezes. so i hold down the on button and turn it off. i check the wiring and all that - nothings wrong here, so i turn it on again does the same thing at the windows bootup display (freezes) so i restart it again and it asks if i want to go into safe mode and i try to move the highlight up but the keyboard isn't working! so it automatically goes into normal mode and it gets to the logon screen and it hasn't freezed yet but the mouse and keyboard don't work. i reconnect them to different usb ports and all that but still nothing! So i use an adapter so i can plug them into the ps/2 ports - the lights flash on the keyboard a couple of times (when booting up gigabyte thing and when booting up windows) but they still don't work. so i am really in need of help, please help me.

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This thread shows a classic hardware-root cause behind seemingly random startup freezes and dead input devices. resolved the problem when the CPU cooler was found to be loose and regained proper contact by changing the case position. 's point about the heatsink/fan needing secure clamping is correct.

Why that causes the symptoms: a heatsink that is not clamped evenly can lose thermal contact, allowing the CPU to heat rapidly. Modern CPUs and chipsets respond by throttling or invoking thermal protection, which can manifest as POST hangs, sudden reboots, or peripheral controllers (USB/keyboard) failing to initialize. Movement during transport or an improperly seated retention bracket are common culprits.

Practical checklist and preventive steps:

  • Power down and unplug before touching the cooler or socket.
  • Inspect the retention mechanism for broken clips, loose screws, or a displaced backplate.
  • Remove the cooler, clean old thermal paste, and reapply a correct, thin layer of thermal compound.
  • Reinstall the heatsink with even pressure so the mounting clips engage fully; confirm the fan is plugged into the CPU_FAN header.
  • Verify the CPU 4-pin/EPS power plug is seated firmly and that motherboard standoffs/backplate are intact.
  • Boot to BIOS/hardware monitor and watch CPU temperature at idle; run a controlled stress test once temps look normal.
  • Avoid relying on laying the case on its side as a permanent fix; secure mechanical mounting is the right solution.
  • If instability continues, check for damaged socket pins, a failing PSU, or bent cooler base; professional service is recommended if unsure.

Handling the cooler carefully and ensuring proper mounting usually cures these symptoms. The thread demonstrates how an apparently software-related failure can be caused by a simple mechanical issue.

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Member Avatar for caperjack

try safe mode again with mouse plugged into ps/2.
hit f8 on bootup for safe mode

Member Avatar for RegalHawk

Ok don't worry. Its fixed. The big cpu cooling fan on the processor was getting a little loose from its traveling and wasn't putting all its wait on the processor so it was over heating. the computer is on its side now so the problem has stopped as the fan is putting all its weight on the processor. Thats it in simple details

Member Avatar for caperjack

Ok don't worry. Its fixed. The big cpu cooling fan on the processor was getting a little loose from its traveling and wasn't putting all its wait on the processor so it was over heating. the computer is on its side now so the problem has stopped as the fan is putting all its weight on the processor. Thats it in simple details

heatsinc and fan should be clamped in place for best results

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