USB keyboard not recognized at startup

Question

Hello to the whole community,
Newly registered on this forum where I usually find my answers very often, I am now facing a wall.
My desktop computer won't start anymore. It freezes right from the start with the message "No keyboard detected" (see photo). My wired Logitech keyboard is connected via USB and has always worked well until today - This desktop is 10 years old and has always run smoothly. I have tried all available USB ports, changed the BIOS battery with a new one, waiting 5 minutes before putting it back, tried with another wired keyboard on the PS2 port, but nothing works, still the same result! This PC is running W10 with the latest updates. Thank you in advance for your feedback. Best regards. Mikaël

georges97 · Answer

Hello,

I don't have a definitive solution to your problem, but I suggest a few tests:

First, you need to consider that the message "usb device over current status detected" means that an overcurrent has been detected on a USB device.

Moreover, it seems that you have two switches (hubs) connected.

I suggest that you disconnect these hubs as well as all other USB devices (except for the mouse, which seems to work) and if the problem persists, restart in safe mode:

https://www.commentcamarche.net/informatique/windows/113-demarrer-windows-10-en-mode-sans-echec/

This should allow you to reconnect your USB devices one by one (restarting in normal mode each time, of course) to identify the problematic device.

Normally, the absence of a keyboard should not prevent you from making the necessary choices and selections with the mouse.

In the second step, you could check that the USB keyboard option is enabled in the BIOS and that the keyboard is plugged into a USB 2 port (black ports).

Best regards

Miky_78 · Answer

Hello Georges97,

First of all, thank you for your reply.
I did some more tests this morning. In order:
- Removed the BIOS battery, changed the jumper for a BIOS Hard Reset. Reinstalled all components but nothing changes.
- I unplugged all USB devices and unnecessary cables to have a minimalist setup including video output and power supply. So no mouse or keyboard. The message is the same, except that there's a 0 on the keyboard and mouse, which is normal.
- I made two new attempts: one with the USB keyboard and one with the PS2 keyboard. The result is still the same. The computer does not start and shuts down after 15 seconds with no possibility of accessing the BIOS since the keyboard, regardless of its connection, does not respond.

From what I read and understand, for me, the problem must probably come from the USB chipset on the motherboard which has likely taken a hit. The keyboard, regardless of its connection type, is not recognized, so it's difficult to access the BIOS as no key allows it (Del / F5 / F8 / etc.)

I will continue to search this weekend but I fear I might have to change at least the motherboard/processor pair and possibly the RAM.

Best regards.

Mikaël

Miky_78 · Answer

Indeed, the keyboard is a standard keyboard (Microsoft) with no specific driver to install.
Computing has its mysteries that can sometimes be difficult to understand.
The two keyboards used on the desktop have been tried on a notebook (with an adapter) and work perfectly - immediate recognition. This leads me to believe that the problem lies with the motherboard and not the peripherals.

I will look into the USB card in a PCI slot. I should have one somewhere at home. It's true that I hadn't thought of that. I will keep you informed.

Have a good weekend too.
Best regards. Mikaël

USB keyboard not recognized at startup

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