Tiffanie Smith

I did everything the internet says to do to fix this on my Chromebook and it still says the same thing and hasn't changed. But I noticed that if I click ctrl+alt+ shift+R it will change the tab recovery_reason to 0×05 TPM error in read-only firmware and then if I click ESC+ refresh+power button, the tab recovery reason goes back to 0×02 recovery button pressed. So I'm very confused. The screen when I turn it on is a white background that has a giant yellow exclamation mark with words under it saying Chrome OS is missing or damaged. Please insert a recovery USB stick or SD card. (note: the blue USB port will NOT work for recovery) I brought it to the store I bought it from but they literally didn't care or help me in anyway and they sent me away