Tab 2 stuck at boot screen - HARD RESET DOESN'T WORK - Galaxy Tab 2 Q&A, Help & Troubleshooting

Hi
I bought a Samsung Galaxy Tab 2 7.0 in Thailand last year. Unfortunately for a while now it's been stuck at the boot screen. I've tried hard resetting (Power on, volume up or down) and nothing appears. The tablet just switches on again. I'm beginning to think I should just give up, as i've tried everything i've heard of. I haven't loaded any new software or anything on it. I can't also try upgrading the software via kies or odin as nothing is detected when I plug the tablet in via USB. It charges normally, the light goes on and the charging animation pops up.
Can somebody PLEASE help?
Also, it doesn't get stuck on a blue Samsung screen. It gets stuck on a green Android screen.

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