Sony Ericsson P1i "letters dont work touch screen" Questions

touch screen is bad and it needs to be replaced,you have to disassemble the phone so that you can replace the LCD screen. Here is a detailed step on how to dissassemble your P1i; STEP 1 Tools required

letters, it didnt respond to keystrokes and slide bar also stopped responding. I tried to reset and even switch off my mobile but it didnt work. Please help me out to correct this problem. try this if