Just registered to say Thank you. Comcast were of no help.
Searched and found this page.


Just completed these steps:
1) 977 code steps above

2) Press Setup until 2 blinks
Enter 981
The remote should blink 4 times.

3) Press Setup until 2 blinks
Enter 982 
The remote should blink 4 times. If it blinks twice, repeat 1 and 2 and it should now blink 4 times. This unlocks the setup code for the Cable device.

PIP was working earlier, but has stopped now. I dont get any option when I click on PIP button.
I have LG 42LD450 TV.
I have a comcast RED ok/select button remote and Scientific Atlanta HD DVR box.

Can you please help me to set up PIP again?

TIA.