HP laptop no display but power on

Brand layer on the shared laptop no display but power on tree. Prefer external monitor test first, then HP Support downloads for your exact product number.

What this page covers

HP steps

Step 1. Confirm power signs on the HP notebook

Confirm AC is connected. Look for power LED behavior for your series. If there are no power signs at all, leave this page and treat power / won’t-turn-on separately.

HP laptop black screen with power LED lit on the chassis edge — Fans, power LED, or keyboard light mean the machine may still be running with a blank lid.

Step 2. Connect an external monitor and switch projection

Connect a known-good HDMI or DisplayPort monitor and power both devices. If the external stays blank, press F4 or the key with a monitor icon until an image appears, and also use Windows + P → Duplicate / Extend.

External works → update graphics / chipset / BIOS from HP (next step), then backlight if the lid stays dark.
External dark → return to the external monitor test (not an automatic LCD replacement conclusion).

HP laptop connected to an external display with HDMI — HP blank-screen articles explicitly use an external display to test video.

Step 3. Update graphics, chipset, and BIOS from HP only

With a usable picture (external is fine), open HP Software and Driver Downloads for your product. Install the latest graphics and chipset packages; install BIOS only when HP offers an update for that exact model and you have stable AC power. HP notes corrupted graphics drivers or LCD backlight problems among blank-screen causes after this branch.

Step 4. Optional HP BIOS recovery when both screens stay unusable

On models HP documents for BIOS recovery: shut down, connect AC, hold Windows + B, press power for about one second, then wait (~40 seconds) for the HP BIOS Update screen. For memory tests, HP PC Hardware Diagnostics is often Esc → F2 at power-on when the firmware UI is reachable. If you cannot follow on-screen prompts, stop and use HP Support / service rather than improvising board-level repair.

HP laptop Windows plus B BIOS recovery key combination — Model-dependent. Follow HP’s blank-screen BIOS recovery section for your series.

Step 5. Stay on the shared diagnosis tree

After HP-specific keys and downloads, continue with home diagnosis, external monitor test, and backlight when the external works. Do not edit TdrDelay. Driver-timeout wording belongs on display driver stopped responding.

Official HP links

FAQ

External monitor blank — did the HP LCD fail?

Not from that fact alone. The external path bypasses the built-in panel. Fix cables, projection mode, drivers, and POST first. Only after the external works do you treat backlight or panel failure.

Where is the product number?

Usually on a bottom sticker or in BIOS. HP Support and driver downloads need that ID — do not guess a similar model.

Should I hold D for LCD BIST on HP?

No. Holding D is Dell’s LCD BIST. On HP, follow HP’s screen and blank-screen articles, then the site backlight guide after an external works.

DLL or one-click HP screen fixer?

No. Use support.hp.com drivers only. Do not edit TdrDelay.