Noted at http://reviewunit.com/how-to-reset-samsung-galaxy-tab-to-factory-settings/
"Reset Samsung Galaxy Tab To Factory Settings Using Its Keys
If you are having some problem with your
Samsung Galaxy tab and you cannot switch it ON, then you can hard reset
your Galaxy tab using its hardware keys. Here is the step by step procedure:"
My partner has a Samsung Galaxy Tab that has been in good working order for a few month now, but it no longer shows that it is charging no matter what we do, and the device will not switch on even though there is enough battery power. We have held the on button to see if this would work but nothing. We have also checked Samsung website for troubleshooting but we can not find one that is relevant.
Please can you help us