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Zorluk: ZorMotherboard, RAM, CPU, and Power Issues

A system administrator notices that a high-performance audio editing desktop unexpectedly powers off without warning during complex multi-track rendering operations. When attempting an immediate restart, the power LED turns on for two seconds and the machine shuts off again. However, if the desktop is left powered off for 15 minutes, it boots into the operating system normally before failing again under heavy load. The technician verifies that the power supply unit (PSU) fan and CPU fan spin upon startup, and idle system voltages on the +12V rail read within standard operating tolerances. Which of the following is the most likely root cause of this behavior?

  1. Thermal protection thermal trip resulting from inadequate heat dissipation between the CPU and heatsinkCevap
  2. B
    A corrupt UEFI/BIOS system image causing a intermittent Power-On Self-Test (POST) recovery loop during RAM initialization
  3. C
    Dual-channel memory modules installed into adjacent motherboard slots causing memory controller over-current shutdowns
  4. D
    Insufficient wattage capacity on the +5V power rail during CPU turbo frequency states

Cevap

Thermal protection thermal trip resulting from inadequate heat dissipation between the CPU and heatsink
The correct answer identifies a CPU thermal trip safety mechanism. Modern motherboards and CPUs incorporate hardware thermal monitors that initiate an immediate power-off when temperatures exceed safety thresholds (T_jmax). An immediate power-on attempt fails because internal temperatures remain elevated; waiting 15 minutes permits passive heat dissipation, allowing the system to boot until processing load causes thermal accumulation again.

Adım Adım Çözüm

1
Analyze the reported symptoms and power behavior
The machine shuts down instantly during heavy workloads, fails an immediate reboot, but boots normally after a 15-minute cooling period.
Electronics cool down during idle time. A required waiting period before successful power-on indicates a thermal protection trip (cutoff) that requires ambient cooling time to lower temperatures below critical threshold.
2
Evaluate power supply and voltage observations
Fans spin and idle +12V rail voltages measure normal, ruling out initial short-circuits or complete PSU dead-on-arrival states.
If the PSU failed completely or experienced a permanent short, the system would not boot cleanly after 15 minutes.
3
Identify the primary failing component and corrective action
The thermal interface material (paste) or CPU heatsink seating has degraded or failed, causing CPU thermal throttling followed by thermal trip shutdown under load.
Re-seating the heatsink with fresh thermal compound resolves heat transfer resistance from the CPU thermal spreader to the cooling fins.

Anahtar Kavram

CPU Thermal Protection and Thermal Trip Diagnostics
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Konular

Motherboard, RAM, CPU, and Power Issues

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