I had problems with typing letters T and G,on off,on my Packard Bell laptop for quite a while. I then bought a new keyboard and went to a professional IT man who fixes laptops for a living. He opened the laptop and there was lots of dust inside. He cleaned it with a small brush,changed the keyboard but it wouldn't work. The mouse was working as normal. Then I left for an hour and he changed the keyboard successfully,but when I went back the touch-pad laptop mouse was now not working. He told me dust MAY have got inside (my fault,though it did work after he dusted it off!) or the circuit (inside) got broken and he could do nothing.It is impossible to fix it,according to him.
He charged me for changing the keyboard and gave me an external mouse as if it was all right. I feel terrible that I went to him with a working touch-pad mouse and got out with a broken one. I find it tricky to work with the external mouse and am FEELING very down about the whole thing. What may have happened,how and why? I so desperately want my old mouse to work and not to carry the new one around with me.I feel like crying.Last night I woke up several times and wanted to cry.Sorry you were sort of taken by a BAD ethic computer repair guy. I service peoples computers on the side and if I break something in the process, I assume liability and replace it. This is why I have my customers bring me their system and we both look it over together and get an assessment as to what is wrong. If something that worked on the day of delivery is broken after the repair, then the damage fees I would eat. I have only had to do this once in the past with my daughter clothes lining the power cord of a laptop I was FIXING and she busted the power jack. Since then I have my own shop where my customers computers are safe and secure.

Getting back to your issue, have you requested the repair guy to fix this issue or else you will share negative feedback with others about his business ethics on facebook or elsewhere? HANDING you a corded mouse as a solution is not a solution.

He should at least take the time to open the laptop up and inspect to see if he accidentally bumped the ribbon cable. Maybe its just partially dislodged and needs to be reseated for the touch pad.

What is the exact model laptop you have so I can look into a parts breakdown for you to make suggestions if the computer guy is not going to assist you with other than a corded mouse.