Black Screen
Laptop runs — fans spin, keyboard lights up — but the display shows nothing. Multiple causes, very different fixes.
A black screen means the display shows no image while the laptop is otherwise running. It has at least four distinct causes, each requiring a different repair.
The critical first step is always to plug in an external monitor. If it works, the fault is in the screen assembly. If neither screen works, the fault is board-level.
| Cause | Torch test | External monitor | Likely fix |
|---|---|---|---|
| Backlight failure | Faint image visible | Works | Screen replacement |
| Flex cable fault | Sometimes | Works | Flex cable replacement |
| GPU fault | No image | Doesn’t work | Board-level repair |
| POST failure | No image | Doesn’t work | Diagnosis required |
Step 1 — Torch test: Shine a torch at the screen at an angle while the laptop is on. A faint image means the backlight has failed but the panel and GPU are fine.
Step 2 — External monitor: Connect via HDMI or USB-C. If it works, the fault is in the display assembly.
Step 3 — Check lid angle: If the screen flickers or shows an image only at certain angles, the flex cable is failing.
Why is my laptop screen black but the laptop is on?
Most commonly backlight failure. Do the torch test: if you can faintly see your desktop, that confirms a backlight fault.
Can a black screen be fixed without replacing the whole laptop?
Yes, in most cases. Backlight and flex cable faults are straightforward repairs. Board-level faults can often be repaired via microsoldering.
Is a black screen always a hardware problem?
Not always. A failed Windows update can cause a black screen on boot. If Safe Mode shows a display, it’s software. If nothing shows in Safe Mode, it’s hardware.
How much does black screen repair cost in Singapore?
Depends on the cause. Free diagnosis and quote before any work begins.
Free diagnosis to find the cause. Same-day repair for backlight, flex cable, and screen faults. 90-day warranty.
