I have a problem with certain keys on this laptop.
When I strike the z Fn / or arrow keys a signal is sent to the laptop which appears different from the key itself.
It locks up the keyboard thereafter because it thinks the key(s) are depressed.
I have traced the foregoing with a keyboard test software application from passmark software.com. It's shareware on trial for 30 days.
According to the diagnostic software, striking one key shows the other offending keys perm. locked in the depressed position, sending signals. But they have not physically been touched.
Oddly, pressing the A key and then the Z key together (in that order) released the jamming.
I've already tried uninstalling the keyboard driver and I've run a complete AVG anti-virus test - all clear. It's XP and all updates are in place.
What next - can you help?
Comments:
Sep 04, 2007
- Before I go for a replacement keyboard I'd like to be sure that the problem is with the hardware rather than with the system software.
How sure are you that the keyboard is at fault? Could it be a virus / trojan, perhaps not being identified by AVG?
WMP10 opens by itself when the keyboard is jamming up. I wondered whether the recent security weakness identified in WMP10 by microsoft (August 17th 2007 security update) might be connected to this. Having a remote user take control of the machine seems a bit extreme for what is a keyboard jam.
Any further reassurance before I call it a day and replace the keyboard?
Thanks people - I really appreciate you taking the time to help.
Arianne.Sep 07, 2007
- Hi Paeroa,
The laptop is from a 71 year old friend that I'm trying to help (me being 30yrs younger).
I asked him whether anything has been spilt over the keyboard but he said no to this question - to be fair, the laptop was in a clean condition when I opened it up so it looks like he has been looking after it properly.
Replacing the keyboard means openning the chasis case. That's not something I'm prepared to do as, knowing my luck, twenty other componants will spring out across the room!
The elderly gentleman called tonight and said that he'd like me to get a quote from a local repair agent. We have a small store in our town (I live in the Scottish Borders, UK) and so that'll be the next step.
The laptop is only two years old and, although the processor and memory is pretty average for 2007, the screen, chassis etc. is decent. It makes sense to check the price of a repair rather than get the fellow to buy even a cheap new laptop - here in the UK about £299 / $600.
Thanks for your help - ArianneSep 07, 2007
- Hi Paeroa,
Thanks for the really fast response.
OK, I'll start up the errant laptop and get back to you.
I'll go into the DOS prompt and test the keyboard, as you suggest.
And then I'll let you know how I get on.
Whatever the outcome, thank you so much for taking the time to help.
Be back soon...........
ArianneSep 07, 2007
- Hi Paeroa,
OK, just to be sure.....I started the laptop. For me it was the F12 key that took me to safe mode. I selected the Administrator account option rather than Bill's (that's his name) account.
Got into safe mode DOS prompt.
Couldn't get any key onto the screen. Whole lot appeared to have frozen / locked up.
So I pressed the A & Z keys down together. I found from the diagnostic software (mentioned earlier) that this has the effect of releasing the keyboard. Nothing. But with the Z key pressed down some of the other keys were prepared to work. Oddly though, these were only on the right hand side of the qwerty keyboard. Most of them did not work properly. For example, J resulted in a numeric value - as was the case for the other alpha keys. Only [ ] = type keys worked properly and then, only with the Z key depressed at the same time.
This is a very different result from what happens when in a Windows programme - say notepad. Here you have to depress the AZ keys to release the jam but then everything works fine unless you hit either the arrow keys / Fn or Z keys. Then it all goes haywire again, with repeated signals to the laptop of either Z / or arrow keys.
It's inconsistant between DOS and Windows. This would logically mean that if might be a software problem? If it's an electrical signal problem under the keyboard keys then would the symptoms not be the same in DOS and a Windows programme?
Next idea?
Best wishes and hear from you soon?
Arianne.Sep 07, 2007
- Peter,
Really grateful.
I'm worried about a BIOS flash because it's not my machine. I'd have to get the XP CD from Bill.
I'm going to think about it overnight (- 12 hrs from you)
Best Wishes,
Arianne.Sep 09, 2007
- Paeroa,
Flashed the BIOS with the file downloaded from the Toshiba website.
It worked......for about 15-20mins. We were euphoric. But then, without warning, the problem reappeared. Same as before.
I thought I'd try and repeat the BIOS re-installation but it won't let me as it says the current installed version of the BIOS is as new as the one I'm trying to install. Which of course it is now!
This is all very strange. It's clearly not the keyboard. I'm really stuck with what it could be.
Any other ideas.
ArianneSep 21, 2007
- Joe,
I did use the recovery CD from Toshiba and that made absolutely no difference. But it did mean all the settings were reset to default and I suspect I'll have to download all the MS updates for XP again, reinstall AVG antivirus etc. etc.
Frankly, other than contacting Toshiba now and asking them to collect the laptop for repair I don't know what more to do - and I've been so busy at work that I've had no time to call the call centre during the day.
Do I have any suspicions......hmm. If I had to choose something then I'd say it's in the BIOS. That's because, after updating the BIOS I managed to get 20mins of use with no problems whatsoever. It came back thereafter, shortly after going on-line with the web. Suspicious me thinks. But because the BIOS file is the very latest I can't carry out a repeat BIOS update. That's a shame because I'd keep the laptop off-line from the web and see how long things last.
It's not my laptop. I'll probably end up getting a quote from Toshiba's replair agents in the UK and then the elderly gentleman who is our family friend can decide whether he wishes to proceed with the repair or not.
What a shame.
And yes, the laptop is 2yrs old, XP2 just like yours.
All the best, Arianne.