My TI is not booting up

[SecretHero]

Hi Everyone,

I've already got in touch with access but thought maybe some of you've seen this before.

I have first generation TI Keyboard with OS 4.5.3 and it's not booting up.
While i was turn it off with Power On/Off button the power cable at the back of TI came off before the device complete turned off.
I tried starting with holding ARP EDIT + plugging power cable while all other cables unplugged.
Two LEDs (BPM and Logo LED) start flashing back and fourth but it still doesn't power on.

I also tried powering on while holding EXIT button. Display at this point very bright but no text is display. Just blank.
I kept holding for few minutes but it never went in to a USB update mode.

I know TI is still good. Maybe it needs the firmware reloaded.

Any help is greatly appreciated.

Thanks!