Self HelpBoise Computer Care

Desktop & PC hardware

Computer won't turn on at all

Computer won't turn on? Check power, drain residual charge, read beep or light codes, and know when the power supply or board needs a pro.

Difficulty
Medium
Time
15-30 min
Steps
6
Updated

Sounds like this?

  • No lights, no fans
  • Power button does nothing
  • Lights come on but nothing on screen
  • Turns on then off right away

Step by step

  1. Check the obvious: wall outlet works, power strip switch is on, and the switch on the back of the desktop power supply is set to I.
  2. Laptop: plug in the charger for 30 minutes, then try. Check that the charger light is on.
  3. Drain residual power: unplug everything (and remove a removable laptop battery), hold the power button 30 seconds, then reconnect and try.
  4. If fans spin but the screen is blank, check the monitor is on and set to the right input, and the cable goes to the graphics card if there is one.
  5. Listen for beeps or watch for a flashing light pattern on the motherboard or power button. Count them and look up your maker's code.
  6. Desktop: if it powers on then off quickly, something may be loose. Make sure the RAM and graphics card are fully seated (only if you're comfortable opening the case).

Related error codes & messages

Quick answers

When should I stop and get professional help with "Computer won't turn on at all"?

Stop and get help if: You smell burning or saw sparks. No sign of power with a known-good outlet and cable. Beep or light codes point to RAM, CPU or board failure. It happened after a storm or power outage (possible surge damage). Boise Computer Care can diagnose it for a $60 fee; call 208-996-3508.

How long does this fix take and how hard is it?

Plan on 15-30 min. Difficulty: Medium.

Is it safe to try this myself?

Mostly, if you follow these precautions: Never open a power supply. It holds dangerous charge even when unplugged. If you smell burning or see smoke, unplug and don't try again.

Which error messages or codes does this guide cover?

Beep codes, Caps Lock blinking, Dell amber light, HP blinking LED.

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  • Diagnostic$60
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  • On-site$100/hr + $100 visit

10504 W Fairview Ave, Boise ID · Fri–Wed 10 AM–8 PM · Closed Thursday

Book a repair at BCCCall 208-996-3508

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