Member Avatar for Dtrin

I have tried countless time to shut off my computer but it wont turn off fully. The monitor shuts off but when it hits the computer nothing happens. The only way to shut it off is to manually shut if off through the front of the computer.

Another issue is 3 of the 4 fans that I have have stopped working I have one in the back of the computer, One underneath the top of the tower those are the ones that are not working, and another on that is working fine down by the bottom of the tower.

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Symptoms from describe two related-but-distinct problems: Windows appears to start shutdown (monitor goes dark) while the chassis stays powered, and most case fans have stopped. These point to either an OS/driver shutdown hang or a hardware power-distribution fault (bad fan headers, cable, PSU or motherboard). The checklist below separates software causes from hardware ones and gives safe, practical tests.

Recommended diagnostic steps for the shutdown hang:

  • Boot from a Live USB (Linux or Windows PE) and issue a shutdown. If the machine powers off cleanly, the fault is software/driver related; if it stays on, hardware is more likely.
  • Boot into Safe Mode and attempt shutdown. Success in Safe Mode implicates drivers/services.
  • Review system logs (Event Viewer on Windows) for services or drivers that fail to stop. On Windows, powercfg -requests can reveal processes blocking sleep/shutdown.
  • Disable device wake features in BIOS and network adapter power options (Wake-on-LAN). Disconnect external USB/peripheral devices and try again.
  • Update chipset, video and network drivers, and consider a BIOS update if the board vendor advises.

Fan and power checks (safe, stepwise):

  • Identify how each fan is powered: motherboard 3/4-pin headers vs Molex/SATA from the PSU. Inspect connectors and wiring for damage.
  • With the system powered off and unplugged, move the working fan to other headers to verify headers. Then, power the PSU and briefly test suspect fans from a known-good Molex/SATA adapter — this isolates the fan from the header/controller.
  • Clean dust with compressed air and inspect bearings/blades. Avoid household penetrating oils; failing bearings usually mean replacing the fan.
  • If several fans on the same cable/header fail together, or if the system behaves oddly while powered, suspect the PSU or a motherboard power rail. The definitive test is swapping in a known-good PSU or having voltages measured by a technician.

Manual power cuts risk data loss; back up important files before extensive testing. Initial replies from and raised useful points; the steps above are intended to separate OS-level hangs from true hardware/power faults so repairs (driver fixes, fan replacements, PSU/motherboard service) can be chosen with confidence.

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Member Avatar for finito

Run a register Cleaner and Defrag your computer. I assume you are talking about shutdown, Start -> Shutdown.

Unless it's a CPU, VGA, or NorthCore Fan. they don't matter.

A temp fix for the fans is some WD-40, but best way is to replace them.

Member Avatar for frankken2

computer not work without running 2 or 3 fans ?why ? please give me information.
Thank you...

Member Avatar for finito

Be specific what fans?

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