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Sounds like the battery might be bad. Try another battery in the laptop and see if it charges. If it does then you know the other battery is bad.
If you try another known working battery and it still wont charge, then try another AC Adapter. If you still cant get the laptop battery to charge then at that point the motherboard is bad because you will have tried another working batter and another working ac adapter.
if you take a hard look at your laptop you'll probably find a key that to disable keyboard that with fn will do it
what type of laptop and model
also check in control panel mouse then device settings see if you disabled in there
This may be a battery power monitor issue. Try disabling the "Mircosoft ACPI- Compliant Control Method Battery" device. This is located in Control Panel-->System-->Hardware Tab-->Device Manager-->Batteries. Had similar problem with 2 Acer Aspire series laptops (diff models). 2 and 3 year old. Original batteries (both still hold charges for 1.5 hrs of normal usage). Running WinXP, one with SP2 and other had SP3. Both came in the last month with slow jerky TPAD function and nearly non responsive keyboard access. Checked the usual; virus, spyware, hijacking, driver conflict etc. Cloned drive and factory installed..still same problem with kb & mouse. However an external USB keyboard and mouse functioned normally (no lag). Noticed with Battery removed kb & mouse was normal. Finally found disabling ACPI control battery device resolved this issue while allowing laptop to run on either battery or AC.
Ya , even i have the same problem. when u r keeping ur laptop on several days and close the lid also, your keypad and mousepad gets heated up. the sensors below the touchpad is very sensitive. hence , it may automatically switch off sometimes to prevent getting overheated.here is one advice,if u r using the laptop for long hours,just take off the battery out from the laptop and run it on ac supply,because a battery can last for 1500-1600 cycles of charging. After that u have to buy a new one.So, make sure u are using ur battery only when u r doing some important projects only.that is why , most companies don't give warranty on ur laptop battery.
The problem is the battery as mentioned before. Disabling "Microsoft ACPI-Compliant Control Battery Method" should solve the problem of the keybord and the mouse, this is, because the driver dosen't work properly with a bad battery. I think it fires a lot of hard interruptions that are blocking the keybord and the mouse interruption to the system (each time a key is pressed an interruption is send to the processor... if the battery driver sends a lot of interruptions, the key interruptions don't have time to be processed in time - that explains the fact that the system responds to a key press is that bad)
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