20 Most Recent Mach Speed Trio Stealth G2 9.7 inch Tablet with 8GB Memory Questions & Answers

If the cable has a micro USB connector (most android tablets do), then the connector is likely the problem. With the cable plugged in, there should be a light to indicate charging. It would usually be orange until charged, when it turns green. If you don't see the light atall, the connection is bad. Try wiggling it to see if that helps. If it does, then you will need to make sure the phone is charging somewhere so that it is not subject to being moved at all, which might cause the connection to become loose. The phone will charge faster if it is off.

Go into Settings/Applications/All and find Google Services Framework and clear the cache (if any) and clear data. Disable DRM Protected Content Storage and Media Storage in your Apps list. Or if either of those fails, uninstall latest update [until you get to the latest properly working update] or factory reset

Ebay is your best bet, i think.

try this http://geek4biz.blogspot.com/2014/01/unlock-mitraveler-or-other-tablets.html

Buy another. Repairing costs a lot of money. Sale it for components, if you can.