coby issue

[ecc12]

I have Coby Mid7022 experience issue with the machine. I had to recover the system using7022-signed which downloaded on internet to get my stem loaded back into os but when I load into os the system would stay on for 1min or so then power off. Battery fully charge but if I go into system recover and leaved it powered on in this dos mode system stays on for ever is this a common problem with this unit or is it the software recovery not correct for this device. Do I need to reflash the device if so dose any one have factory flash for this device? Thank You