Ti Nspire blinking but cant turn on

[trunganh]

Hello guys,
My TI nspire doesnt work anymore. I try to charge it but it's always blinking black and white. Then I tried to press ESC DOC and Minus key in the same time and my TI in Diag mode ( i guess) but it can't turn on. Is that a problem about the battery or about the software ( i rarely connect my TI with the PC). Sorry for my bad english
Thanks for answering

[critor]

Hi.

It looks like your battery is critically low.

While in Diags mode :

• type

  5

  for "manuel test"
• then choose "battery test"
• and then choose "battery charge"

If up/down arrows don't work, use or , and then to confirm.

Then let the calculator connected to an USB power source for several hours (a night long, to be sure).