In attempting to install the Firmware 1.05 Update, I had some problems. I put the CTX50105.upd file into the root on a 32 gb thumb drive, and began following the printed procedures to install the update. While holding down the 7,8 and 9 buttons, I pressed the start button. All of the icons on the display turned on and the blocks where the Tone/Rhythm names are displayed were solid black. The instructions said I should see "UPD MODE" on the display, but with the number/letter boxes black, I could see nothing. I turned off the keyboard and repeated the instructions again with the same results. I tried changing the lighting angle and viewing the display differently and thought I saw "UPD MODE" extremely faint against the black. I pushed a button and the very faint lettering said SETUP (I think). After a few moments I thought I could make out SEL FILE, but I did not see CTX50105 on the display. If I somehow got to the right place, how do I select the CTX file? And why does the display go black making it nearly impossible to read?