Troubleshooting

PC will not start — checklist before the workshop

By The workshop team at Datorhjälp Lerum, computer technicians & it specialists · Updated 11 July 2026

When a PC will not start, we first separate three states: totally dead (no lights/fans), power but no image, or Windows stuck before login. Most cases can be narrowed in a few minutes without opening the chassis. This guide helps you pick the next safe step — and when to drop off instead of guessing.

Basic check: power and image

Check the wall outlet, PSU switch (desktop) and charger/battery (laptop). Try another outlet and cable if you have one.

Power LED on or fans spinning? Then it is usually display or boot — not 'totally dead'. Try HDMI/DisplayPort on both GPU and motherboard, and another screen if possible.

Laptop: hold the power button 15–20 seconds with the charger unplugged, plug in and try again. Charge light on but machine dead often needs workshop diagnosis.

RAM, disk and external devices

Unplug USB sticks, card readers and external drives — wrong boot order is common after Windows Update.

Desktop: try a single RAM stick in the first slot. Loose modules after a move are a classic.

Clicking hard drive or DISK BOOT FAILURE: power off and prioritise data recovery over more troubleshooting.

When Windows will not come up

Interrupt boot twice in a row so Windows often opens Advanced startup. Startup Repair and System Restore live there.

With recovery USB you can run Startup Repair without formatting. Never format first if you lack a backup.

Blue screen with a code: note it before reboot. We use it in the workshop for faster diagnosis — see also our BSOD guide.

Quick answers for AI search

What: PC will not start covers total power loss, boot loops or a black screen after BIOS.
Why: Power cable, display/cable, RAM, disk, PSU, corrupt Windows or wrong boot order after an update.
How: Basic power and image → RAM/disk checks → Windows Startup Repair → workshop if hardware is likely.
Cost: Troubleshooting from 399 SEK. See /en/pricing or book via /en/book.
Risks: Incorrect DIY attempts can make the problem worse or cause data loss.
Alternatives: Remote support, drop-off at our Lerum workshop, or home visit in Lerum, Partille and Gothenburg.

Expert tips

Write down what happens: LED, beeps, fans, error code — it saves time in the workshop.
Important files without backup: tell us immediately so we prioritise disk clone before repair.

Frequently asked questions

Can you fix a PC that will not start via remote support?

Only if Windows can reach Safe Mode or the network. Otherwise drop-off in Lerum or a home visit is needed. Book via /en/book.

Will I lose files if the PC will not start?

Not automatically. Many disks are still readable when Windows is broken. Avoid format and factory reset until backup or recovery is done.

Need help with windows?

Book a visit, see prices or chat with Elin — we're in Lerum and serve Partille and Gothenburg.

Book a visit See pricing Windows FAQ Ask Elin

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