1.檢查電源連接、測(cè)試電源、檢查電源按鈕、查看主板LED；2.進(jìn)入安全模式、檢查磁盤(pán)健康、運(yùn)行啟動(dòng)修復(fù)、卸載最近更新；3.清除CMOS、重插內(nèi)存和顯卡、斷開(kāi)非必要硬件；4.檢查過(guò)熱、測(cè)試內(nèi)存、查看事件查看器、修復(fù)系統(tǒng)文件。按步驟排查可快速解決多數(shù)PC無(wú)法啟動(dòng)問(wèn)題，無(wú)需更換硬件即可恢復(fù)正常啟動(dòng)，問(wèn)題通常源于配置錯(cuò)誤或軟件損壞。

When your PC won’t boot properly, it can be frustrating—but most issues have clear causes and fixes. Here’s how to troubleshoot the most common PC booting problems, step by step.

1. "No Power" or Black Screen on Startup

If pressing the power button does nothing or the screen stays black:

• ? Check power connections: Make sure the power cable is securely plugged into both the wall outlet and the PSU (Power Supply Unit). Try a different cable or outlet if possible.
• ? Test the PSU: If the fans don’t spin and LEDs don’t light up, the PSU might be dead. Swap it with a known-good one if available.
• ? Inspect the power button: Sometimes the case’s power switch fails. You can test this by shorting the two pins on the motherboard’s power header with a screwdriver (briefly touch them together—like a quick tap).
• ? Look for LED indicators: Many motherboards have small LEDs near the RAM or CPU that light up if there’s a hardware fault (check your motherboard manual for meanings).

2. PC Turns On But Won’t Boot to Windows (Stuck on Logo or Spinning Dots)

This usually points to software or drive issues:

• ? Boot into Safe Mode: Restart and hold Shift while clicking “Restart” from the login screen (or spam F8/F11 during boot on older systems). Safe Mode loads minimal drivers—great for diagnosing software conflicts.
• ? Check disk health: Run chkdsk C: /f /r from Command Prompt (Admin) to scan for disk errors.
• ? Run Startup Repair: Use a Windows USB installer → “Repair your computer” → Troubleshoot → Startup Repair.
• ? Recent updates or drivers? Uninstall recent Windows updates or drivers in Safe Mode—they’re often the culprit.

3. BIOS/UEFI Doesn’t Load (No POST)

If the system powers on but never reaches the BIOS screen:

• ? Clear CMOS: Reset BIOS settings by removing the CMOS battery for 5 minutes or using the jumper on the motherboard (see manual).
• ? Reseat RAM and GPU: Remove and reinsert RAM sticks and graphics card—loose components are a top cause of no POST.
• ? Disconnect non-essential hardware: Unplug extra drives, USB devices, and peripherals. Boot with just CPU, one RAM stick, and integrated graphics (if available).

4. Rebooting in a Loop or Crashing During Boot

This could be hardware or OS corruption:

• ? Check for overheating: Dusty fans or dried thermal paste can cause thermal shutdowns. Clean fans and reapply paste if needed.
• ? Test RAM: Use Windows Memory Diagnostic or MemTest86 to check for bad RAM.
• ?? Check Event Viewer: If you can get into Windows briefly, open Event Viewer → Windows Logs → System to see critical errors around boot time.
• ? Corrupt system files? Run sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth in Command Prompt (Admin).

Pro Tip:
Keep a bootable USB with tools like:

• Windows Recovery Environment (WinRE)
• MemTest86
• Hiren’s BootCD PE
  These can save hours when your system won’t even start.

Most boot issues aren’t hardware failures—they’re misconfigurations, failing drives, or corrupt software. Start simple, eliminate possibilities one by one, and you’ll usually find the fix fast.
Basically, it’s methodical, not magic.

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