Posted 24 March 2012 - 12:40 PM
Compaq V6000 Vista Home, (32 bit) service pack 2. Computer about four years old. Motherboard replaced about four months ago because of graphic chips issue.
After a period of time / 30 min or so(?) (varies) the touchpad stops working. The blue power light continues to stay on, indicating the pad is still “turned on” but the pad and buttons don't function. When the touchpad goes into this state, the icon on the bottom toolbar disappears. I also loose all sound, although the speaker icon remains.
When in this state the touchpad blue power light stays on and pushing the touchpad power button has no affect. (it should turn it off and illuminate an orange light)
The touch pad will also go into this state if the computer goes into the hibernate or sleep mode. One interesting thing, when in sleep or hibernate mode, you can awaken the computer by touching the touchpad surface, indicating to me that the pad is working until the computer comes “awake.” After it wakes up, the blue blight is still on but the touchpad is inoperable.
If the touchpad is working, you can enter the sleep mode, return and the touchpad will continue to function normally.
To restore the touchpad and sound, the computer must be restarted. After that, everything works fine for a while. (time varies)
I can plug in a USB mouse to get around this issue.
I have done extensive research on Google. This issue has been happening at least since 2009. (although I didn't run across the sound issue mentioned) There are many “solutions” but none have seemed to work for me and I suspect many posters did think they found a fix, only to find the issue came back. This issue has also been reported using Linux. XP & 7. (May be a different cause) There were some work around fixes but I'm not sure if they would have any bearing with my issue (and I'm not sure they were successful)
Some basic things tried / checked:
Device manager shows the touchpad is working properly.
Uninstalled the touchpad.
Installed a driver from Synaptics.
Installed an updated driver from HP.
Uninstalled a Windows update from around the time the issue was noticed.
(I later reinstalled the update when I discovered the issue remained)
After doing each of these things, the touchpad did work for a while. (but it was rebooted to make these changes)
I couldn't do a system restore because there wasn't a restore point listed far enough back. (reports from others suggest this hasn't been a true fix)
For further help, Synaptics suggests asking HP, HP suggest asking Synaptics.
Well, that was written a few days ago. Since then I have been trying different settings in device manager. I seemed to have altered something and got an error message for the touchpad. Error 24.
Uninstalling it and reinstalling it doesn't help. In fact now that the error is showing, rebooting doesn't bring the touchpad back to life.
Now that the touchpad seems “dead,” a similar issue is happening with the keyboard. It seems to “goes to sleep” and a reboot is necessary. Again, no error is showing in device manager for the keyboard.
I just uninstalled the touchpad again, I pulled the battery out, shut the computer down, unplugged the power cord. I held the power button down for one minute to drain any residual power. I rebooted, Vista found the touchpad and installed old drivers. I updated the drivers. Now I am back to where I was before. No errors showing in device manager but the touchpad goes to sleep after about 15 minutes.
Re-flashed Bios (went to HP used the "auto find" for latest bios)
Just noticed after another restart, touchpad not working again. Device manager showing an error again (code 24) The keyboard also stops functioning at times, necessitating a reboot.
Thinking back, I realize that the loss of audio may have happened before the other issues. I just tried uninstalling the audio, reinstalled. No change. (audio does work if keyboard or touchpad are working)
There have been some references to power settings/options – that they may affect which services/applications function properly if the battery is bad. My battery does need to be replaced. I have had mixed feelings about buying a new battery if it's not a solution.
Any suggestions what to check next?