[Q] Need help with a Toshiba Thrive

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(Note: I've seen one somewhat about this subject before. However, it's an older thread, so I don't figure on it getting any notice anytime soon. That's why I'm posting a whole new thread.)

I have a Toshiba Thrive 10.1 (with 32GB RAM) that recently quit on me. All it will do for me now is boot up to the splash screen (the one saying it's a Toshiba and such) and then stops doing anything other than showing that screen. I've tried the data/factory reset option, but that doesn't change anything (it still boots to the same point and locks up). The factory reset ROM's I've tried all fail at "Verifying update package..." with the error "E:signature verification failed" followed by aborting... I've been able to fix computers since Win 3.1 (yeah, showing my age a bit) up until now with no real problems, but Android is a different animal... I've tried the "Thrive USB ADB" utility, Toshiba Easy Flash utility, and a few different factory reset ROM's... All have failed....

Also worth saying.... When trying the Easy Flash Tool and doing exactly as it says (except for not being able to tell the device to go into USB debugging mode), all the utility seems to do is sit and wait for my device.

At this point, I'm not really sure if there's a hardware issue as it does act like it would run if I could restore the software. What I may need is a step-by-step, get this file, do this thing, type of help...