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General discussion

Laptop keyboard issues. Or is it the motherboard?

Apr 13, 2009 10:27AM PDT

Hey. I'm hoping someone here can help me. I have a laptop (Presario V3000 running XP) that was "exposed", shall we say, to some plain water in the keyboard area. After the initial drying out, it boots up fine, but Windows constantly thinks that the CTRL key is pressed. I have confirmed that neither CTRL is pressed physically, and have made sure that this is not due to the "Sticky Keys" function.
I then tried removing the keyboard and plugging in my wireless USB one, but the problem stayed the same. There is no PS2 port on the laptop to try an older one. This lead me to think it was a motherboard problem rather than the keyboard.
However, last night I left the original keyboard fitted and was playing with the On Screen Keyboard. If it press the CTRL key on the on screen board a couple of times (sometimes just one turn off and on, sometimes 6 or 8 times), the laptop keyboard starts responding normally. It is then fine until you reboot, when it goes back to its inoperative state.
So, is this a problem with the actual keyboard, or does anyone have any idea what may be going on? Google hasn't managed to find me anything of worth, although I did find another forum where someone had the same problem on a different make of laptop (Toshiba) but nobody had responded to his post with any suggestions.
Any help would be greatly appreciated.
Cheers.

Discussion is locked

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Try a test I use for this.
Apr 13, 2009 12:06PM PDT

When I suspect it's the hardware I boot up my Linux CD. No, we don't install Linux. We just use one of the dozens of Linux's that come ready to run from CD.

I test it this way since I want to be sure it's not a nutty Windows issue.

Sadly if Linux shows the same issue you replace the motherboard and keyboard. Whichever is the cheapest part first.
Bob

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Thanks Bob!
Apr 13, 2009 2:40PM PDT

Thanks Bob.
The only issue I can see with this is if the BIOS is not set to boot from CD as its first option. Due to the keyboard problems, I have only managed to actually get into the BIOS once before, as the F10 key doesn't work from the moment you put power on. As an aside, I have noticed that sometimes when I first push the on button, I get the usual COMPAQ screen with the options down the bottom left corner (ie: press F10 for Setup, F11 for recovery etc) and the "Award" logo on the right bottom corner. Other times, however, the COMPAQ logo still appears but all I get on the bottom left is words to the effect of "Press F2 for options" or something similar. This is written in a really squashed up, itallic sort of font, and it looks like a problem with the video output, but the COMPAQ logo looks fine and there are never any other video issues.
Apart from that, I have zero experience with Linux. I assume I can download a version of it that will boot from CD?
Thanks again.

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You assume right.
Apr 13, 2009 8:50PM PDT

There are dozens of versions out there. All free and no experience required as you read http://tips.oncomputers.info/archives2004/0401/2004-Jan-11.htm

If you want to try a test (ADVANCED SKILLS?) unplug the wide cable from the keyboard to the motherboard and see if the external keyboards work. If not we are back to back keyboard or board.

Let's be clear here. Laptops are not cheap to fix. But that keyboard is your cheap part at under 100 bucks so its why we replace that first then the motherboard. If the keyboard does it, the customer got lucky.
Bob

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Thanks again.
Apr 14, 2009 10:27AM PDT

Well, I found a keyboard of the right part number on eBay for about $30, so I just bought it. Should be here in a few days hopefully. I'll plug that in and see. In the mean time, I'll get a Linux CD sorted and hopefully be a step closer to an answer. A new motherboard is about $300 so I'd have to think carefully if that needs to be replaced. It isn't the worlds highest spec machine. Might be better to part it out on eBay!
Cheers Bob.

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Let me share what I got for 300....
Apr 14, 2009 12:51PM PDT

I picked up the Acer Aspire One netbook with 160GB hard disk, 1GB RAM and XP. It's much faster than I expected.
Bob

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sure it is... now
Apr 14, 2009 12:58PM PDT

It is now but they don't thread well and any daemon type program slows them down brutally, Not that I mind, I only run MSN as a back ground program, but most people end up with viruses, or have other utills in back ground like nortain and other poitless things

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Really? I run my very own code on it.
Apr 15, 2009 1:20AM PDT

Let me share I write some applications for WinMo and more. This netbook has the hyperthread feature and is threading nicely thank you.

Are you an owner with code that you wrote or just a commenter?
Bob

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Here's hoping......
Apr 27, 2009 7:49PM PDT

In case anyone is interested and has the same issues, just thought I would post that I put a new keyboard in the machine and it's still the same. So I'm guessing it's the motherboard that needs to be replaced. However, I might just get lucky (first time for everything...) as the laptop has recently had an issue with the WiFi card disappearing from the device manager and the screen going blank. After some Googling I found that there is a sort of recall by H.P for these machines displaying these symptoms. I called H.P and they have arranged to have the machine repaired. According to some on the net, the fix for this is to replace the motherboard, so if I'm really, really lucky, I may get it fixed for nothing!
However it is more likely the repair mob will send it back with a note saying it's a piece of junk! To be honest I've been getting by with an external keyboard for now, but the WiFi thing is a bit of pain. Fingers crossed........

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Yes, I know that issue.
Apr 28, 2009 1:13AM PDT

What I've been doing is to disable the onboard wifi and use a PC card for that function. If you can get the maker to correct it, that's good but I find it fails again in about the same number of years.
Bob

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Sorted!
Jun 17, 2009 2:15PM PDT

Just an update (if anyone's interested).
Got the laptop back from the repair shop. I think they installed some bits that may not have been totally necessary, but hey, I wasn't paying! All in, it's had a new keyboard (put in by them), new motherboard, new touchpad (?) and new screen (?!?), and funnily enough is working like a new machine now! I've just stuck 4Gb of RAM and a 320Gb HDD in it, and I'm very happy. Thanks go to H.P for paying to fix it up.
Result!