I have a Toshiba Satellite C875D-S7120 to fix. It has Windows 8. The touchpad and mouse buttons do not respond at all. They quit accepting input without warning. Device Manager and msinfo32 show no errors and Device Manager says the device is working properly. I have tried the Fn + F5 to turn off, then back on, and that has no effect. I tried 2 older drivers. Both installed correctly but did not fix the problem. I have 3 spare scrap Toshiba Satellite laptops, a C655-S5225, a Pro L550-EZ1702, and a C855D-S5305. All 3 have the same Synaptics touchpad, the part numbers match. I swapped in each of them and tested. That still did not SOLVE the problem. Is it MAYBE a problem with the touchpad connector on the motherboard? The system is otherwise fine and works properly and a USB mouse works. If none of the touchpads work then I would SAY it is the connector on the motherboard
Hi

Perhaps it is the DRIVER you are using, you can use a generic windows ms mouse driver to test if it is drivers. If that still doesn't make the mouse pad work then it is a hardware problem.
 
Thanks, Lisa. I tried different drivers as well. It seems the connector on the motherboard is bad. Since the laptop works fine otherwise, the owner opted to use a USB wireless mouse for it. Quote from: DartMan 68 on June 06, 2016, 09:24:32 PM

Thanks, Lisa. I tried different drivers as well. It seems the connector on the motherboard is bad. Since the laptop works fine otherwise, the owner opted to use a USB wireless mouse for it.