Solved System won't load keyboard and mouse at start

[robwin7fo]

Hello everyone,

While I was in the middle of using my system, all of a sudden the mouse and keyboard stopped working. I had no choice but to press the switch button to shut it down. I removed the battery, the power cable and all the input devices (Keyboard and mouse). After replacing them back I switched the machine ON, and I could see the flashing light on the Keybard, and the mouse light also ON (red). The memory count starts to the end, on a black screen, and then followed by the blue box at the bottom left of the screen where written "F1: Save Changes".

But I can't get rid of it this time because the Keyboard doesn't function/respond.

Machine Desktop HP 7100 CMT, Win7 ultimate 32bit, IE11, HP Keyboard PS/2, HP mouse PS/2.

I removed the HD into another machine, it works without any problem. Therefore, the problem seems NOt on the HDD side. All the keyboard and mouse work properly on other machines.

I changed the Keyboard to USB but the same result. I removed all the memory modules of 4GB in total, and replaced them with just one stick of 1GB, again no change, still can't move past the black screen to record the change, or to advance to Windows, or to access into BIOS setup.

I did this with and without HDD connected, but with the same result. I inserted the Installation disc into the DVD Drive for repair or recovery, it didn't make sense because it required the command "F1: Save Changes" must first be accomplished. But it doesn't go beyond this as the Keyboard doesn't respond. Of course, I can't get into BIOS, nor use Safe mode, because the Keyboard doesn't function. Finally, I got stuck. I really appreciate for any help, please.

Thanks

 

[UKMedia]

Hi

I'm stumped as well as normally I would suggest plugging in a PS/2 keyboard... Have you tried waiting to see if the message times out?

When you removed the battery, did you also press the power switch for 4-5 seconds to ensure that everything was powered down?

Regards
UKMedia

 

[robwin7fo]

UKMedia:

As a matter of fact, I changed the battery to a new one as I had several spares of it. As you can see to replace it to a new one, it would have taken me a few minutes - with the power cable disconnected. Also, I did press the small yellow reset button (while the battery was off, and after it was replaced,) for a minute or 2, then tried all things again, and again.

Rob

 

[UKMedia]

Hi Rob

I'm stumped then but there are some much more clever people in the forum, so I'm sure they will sort this eventually.

Regards
UKMedia

 

[robwin7fo]

UKMedia:

It's been a long battle. Finally I bumped into this keyboard failure on boot fix - YouTube

What a trick!

In fact, all it is, first to remove all perpherals including the mouse except the Keyboard, while the machine is OFF. On the power-on, to keep hitting or pressing down the F1 key, and (sometimes releasing it time to time as the noise is a nuisance, but) before F1 shows up, from then on not to remove the finger pressing down that key. Eventually, after a few seconds, the Keyboard is back to normal.

I've never thought of this impressive idea, so brilliant. I thought my System board was the culprit to be written off, and thus needed to be replaced. Thank God, I didn't go that far. Now all is well again. Thank you so much for every efforts you made, and to others, too.

Rob