The service manual for the 3793 is on this page and the keyboard cable is labeled #3 on page 77. Also this YouTube video will help as it clearly shows the cable connector above the battery. The picture of the motherboard below clearly has the keyboard plug labeled as KB naturally. [IMAGE]
About 6 months ago I had to start using a USB keyboard as the on board had basically stopped working. I just plugged in and a keyboard and have used it like I said about 6 months. But in the last week or so I have had a new problem show up. Any time I start typing, I have various and random menu's open (start setting {or sub-menu} or context possibly others I don't remember)  in the beginning it was just annoying, but now sometimes it's every 1 or 2 letters. Then there will be anywhere from 1 to 6 menus open at once, close all that, hit two letters, and close all again. So if I could get a picture with one of those red arrows, I would appreciate it.
Need to unplug keyboard