HP G72 would´t start - Black Screen - Power on and Num Lock LED white

[Ds1964]

After Windows Updates the Laptop didnt start. Power ok, Fan works loud then still. But only black Screen

No Beeps, No Bios - Screen, No windows screen.

Only Power LED, Num Lock LED whit eand F11 (WLAN) orange

All tips like Windows Key + B or V,  Windows key + Ctrl + Shift + B , Power off then 30 sec Power Button  - no reaction.

[Kuroi_Kenshi]

Hi @Ds1964,

Welcome to the HP Support Community!

Thanks for reaching out!

We're thrilled to have the opportunity to assist you and provide a solution.

I understand your HP G72 laptop powers on but shows a black screen with the Power and Num Lock LEDs lit, after Windows updates. Let’s go through a few steps to check what could be causing this.

Perform a full hard reset
Turn the laptop off and disconnect the power adapter.
Remove the battery, then press and hold the Power button for 30 seconds to discharge residual power.

Test with minimal hardware
With the battery still removed, connect only the power adapter and try turning the laptop on.
This helps rule out a battery-related power or startup issue.

Check for display output on an external monitor
Connect the laptop to an external monitor using VGA or HDMI.
Power on the laptop and press Fn + F4 (or the display toggle key) a few times to switch display output.

Observe LED behavior carefully
Check if the Caps Lock or Num Lock LEDs blink in any pattern when powering on.
Blink patterns indicate hardware fault codes; no blinking usually points to a board-level or display failure.

Reseat memory modules
Turn the laptop off, disconnect power, and remove the battery.
Open the memory compartment, remove all RAM modules, then reinstall one module firmly and test.

Attempt to start without the hard drive
With power disconnected, remove the hard drive and then power the laptop on.
If the screen remains black, the issue is not related to Windows or the drive.

Check keyboard and wireless LED state
A solid white Num Lock LED and orange wireless LED at startup indicate the system powers on but does not complete POST.
When no BIOS screen appears, this points to a motherboard, BIOS corruption, or graphics-related failure.

Rule out BIOS recovery failure
Since Windows + B / V key recovery methods show no reaction, BIOS recovery is not initiating.
This strongly suggests the BIOS is not executing at all during startup.

I hope this helps.

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Best regards,