Ac adapter affects touchpad

[Tyght]

Two days ago everything was working fine with my Hp 630 laptop only for it to develop this mouse freezing thing. I did plug the laptop to AC current for a pretty long time (than usual) & on turning it 'on', i found out that the touchpad had stopped working & when it does, was erratic. Funny thing is, once i unplug the charger from it, the mouse starts working as normal; has anyone ever had such issue, is it possible that the adapter is bad (cos when i tried it on a similar laptop, same thing happened)?

[ttgpcs]

This appears to be a common problem, especially with replacement adapters, judging by the number of posts on the net. However, no solutions seem available. I have recently encountered the same problem with some HP and Toshiba  laptops which I bought. I had some genuine adapters but some were missing so I bought replacements on ebay. With most, when they were plugged in the touchpads were erratic and unusable. Running on batteries, everything was fine. As I could compare the situation with genuine adapters, it was easy to prove it was an adapter problem. A USB mouse worked fine even when the replacement adapters were plugged in. Interestingly, if a metal part of the laptop were touched, eg, VGA port, com port, USB port, then the touchpad worked normally with the replacement adapters. It wasn't due to the earth pin on the adapter as some have suggested, as the original Toshiba adapters only have 2 pins and work fine. It must be due to the earthing of the laptop itself which in the original adapters probably occurs via the neutral pin. There are 2 work arounds. I have given up on the touchpads and am using a USB Mouse. You can also plug in a USB printer cable and tuck the other end into your underwear but that's hardly practical. Why your adapter only suddenly started to give this problem is difficult to say, but something may have failed in it. If you buy a cheap replacement adapter off ebay, I suggest that more than likely you will still have the same problem. If you can get a genuine replacement (expensive?) then you should be OK.

Cheers

[Tyght]

Those your adapter also get very hot, cos mine does that when plugged to power.