hickory

I have a problem & would like to ask all you good folk your thoughts.

Yesterday I had my TT 910 on the dock to retrieve some .gpx files from the ITN folder created by Event Logger. I had been doing this on a daily
basis,- assessing the reliability of the data for geo-caching info to tag my photos for a road trip in the US in about 2 weeks time.

I copied the files over & for the first time ever (not sure why!) I used the task bar option to "safely remove hardware'. Well after this it instantly refuses to boot.
I've reset it many times, for 30 sec or more,- I've held down the pause/resume button too. All to no avail. Nothing happens.
Once it is reset and unplugged, if I look very closely at the green 'power on' light as I press the button it gives a very brief flash of green (milliseconds) but that's it. It won't flash green again unless reset again.
I charged it all night but no go. I checked the wall charger output with a multimeter. All good. I took it out to the car and tried the car charger. No go.

Could it have corrupted some data in the bios (bootloader) or if by coincidence the hard drive has died I thought it would still give a message
from the b/l (bios) like a PC saying it had a 'volume' problem.