The internal screen is completely black when it's

Look on youtube how to replace the LCD, looks like the light went out... the connector might just be loose..

hmm, the only way you won't be able to send messeges, and receive that notification is 1. you have bad reception, 2. the phone you sent it to has your number blocked. 3. your phone is using an incorrect carrier sim card.

Switch-off your phone. 1. Press and hold 3
keys; Green dial key, *
Star key, no. 3 key on keypad and then press
the power on/off to
swtich on the phone. Remember, do not let go the 3
press and hold
keys until you see a formatting word screen show! 2.
After a few
minutes when the Full phone formatting completed, your phone
will
back to original system and factory settting.

keypad is complaint it need to be changed better contact a cell phone service center...

Try keeping it in a warmer environment! If you keep it in a temperature above 32 degrees F (or zero degrees C), how could it possibly freeze?

keypad mat of your might have rust or deteriorated.
does your wet?

Hi,

This is most probably a software/firmware issue with the phone. Try updating the software with the Sony Ericsson update service.

http://www.sonyericsson.com/cws/support/products/updateservice/w580i?cc=gb&lc=en

If this doesn't work you will need to have it flashed with proper equipment,

Hi ur problem is very simple. u go ur nearest motocare centre and change ur 's mobile internal keypad.

you may have to get the flexcable or the lcd replaced take the mobile to a mobile service center or a mobile tech and have them check your mobile.

Sounds like your phone's been through some rough treatment - try taking the battery & sim card off for a while - make sure there's no moisture & if you're still having problems, stop by your dealership shop & see what they can do.