I have a sharp Blu-ray player and it was programmed where I can use the scroll function on the Comcast remote but, the enter button does not work. I cannot do anything without being able to use the enter button. Is there a code I can use to program the enter button to work.

 We need to know the setup code you're presently using with the Sharp Blu-ray.  You can blink this back using either the Comcast instructions or these 9XX commands instructions.

Thanks for the reply. The code that I am using is 21256.

I'm not sure which function you mean by "Enter".  I think the Sharp has a Select function and a Return function.  The EFC for Select is 11444 and Return 12476

Try this in AUX mode:
1) Press Setup until 2 blinks
2) Enter 994 (2 blinks)
3) Tap Setup  (don't hold it)
4) Enter 11444
5) Press OK/Select (or any other button, except devices and Setup.

Now pressing OK/Select should send the Blu-ray Select function.
If the needed function is Return, use 12476 instead.  It's OK to use HD Zoom/Enter if you like.

Thanks the code works. Could you help with the menu,eject and power button those buttons don't work for me.

 Here's some EFCs for the  BD-HP20U.

0	28602
1	61879
2	61371
3	62387
4	60605
5	61621
6	61113
7	62129
8	28094
9	29110
power	57781
display/info	58289
exit	06836
up arrow	03515
down arrow	04531
left arrow	04031
right arrow	05047
select	11444
play	03773
pause	36798
rewind	37556
fast fwd	52659
stop	04789
f.fwd/next track	36540
f.rew/prev track	37040
Top Menu	19890
Pop-Up Menu	13242
Setup	06320
Return	12476
Audio	19632
SubTitle	21438
Angle	20922
Zoom +	15792
Zoom -	02226
Lock	14259
Repeat	53433
Repeat Off	01726
Slow	36024
Light	49339
Component Reset	02742
HDMI	26045
Replay	54706
Skip Search	30651
Function	12734
Eject	57273
Keypad Enter	11444
Keypad Clear	12984
A (Red)	38847
B (Green)	39863
C (Blue)	38073
D (Yellow)	39089