Power And Sleep Mode


Mar 18, 2012
My android tablet goes into sleep mode after 5 mins, it will not power up out of sleep mode, if I put on charge, and then take off charge, it starts up out of sleep mode, saying charger removed, while it is on, I try to power off, it will not switch off, it then goes into sleep mode again after 5 mins and again will not power up , contact seller and am told to upgrade firmware, is this right, i just presumed that the power button was knackered, on checking when it is on, it says all updates are up to date , have android 4.0. thanks