My phone is lock

Yes. You can do a hard reboot but holing down the volume down while holding the power button down (from the off state) to reset the phone to factory condition. You can find a YouTube video on this.

Sound on means audio section is ok. No picture is video board problem. Pl check input cables. Or give Hdmi cable input. Disconnect all inputs switch on u should get plain raster that is only dots on screen, or blue back screen, if nothing contact authorised dealer,

Mostly all nokia phones have a full phone lock along with a keylock.
To enter a security lock, you need to activate it first.
for this,
go to your settings-> phone settings and scroll down to security keyguard. Then switch it on in case it is off.
Note: in case your phone locks at this moment, the default keylock is 12345 to unlock
After this you need to put in a new password to the security keylock
For this, Go to Settings-->Access codes--> Change Security code
Enter the default keylock i.e. 12345 . Then enter a new password which you will remember. Verify it by entering it again.
After you have done this, go back to settings->phone->Automatic Keyguard
Switch it on and enter the time for the keylock ( can be 5,10 or 15seconds depending on your choice)
After all this is done, you are good to go. Just remember your passcode.

my phone is locked and i cnt remember the unlock code

You have to reset your mobile if you forget your security lock.I found a free master reset service at Unlocking4free.com .Through this you can reset your Nokia 6020 easily..

1122 remove lok new lock forget plesehelp me

For soft reset type *#7780# For hard reset type *#7370# and if it ask passcode enter the passcode as 1234 as default.Please backup all your data if you performing hard reset because hard reset deletes all data on your phone like contacts,messages,music,videos and photos

Try another AV cable or another TV, if it doesnt work, that means that there is a problem with your AV PORT. and you need to send the console for repair, Call 1-800-4MYXBOX to check the warranty status

If you have the USB cable for the phone you can read you phone code with setool2lite. Setool2lite is a free soft for customizing SE phones.

i dont remember my phone lock code sonyerickson w800i thanks