Screen locked up mid-entry and will not respond to any input. one letter which was being input at screen freeze is blue in color. any suggestions on how to wake this thing up?

If it did work before, it should work now. But if you are connecting a new device, make sure you are using the right inputs.
Yoou still can get the manual online, but to point out what I mean I send one picture about how to connect (Only one example) where you have to use 3 colours on the cable.
When connecting a video recorder (low quality, you only need 1 colour, for the composite entry (Yellow)


The link is for the manual:

http://downloadcenter.samsung.com/content/UM/200307/20030708161858250_SPN4235_00487A_0514.pdf

Sounds like yo have the scroll lock or num lock turned on. If the scroll key is a colored key (the scroll lk lettering is blue) then you will have to Press and Hold the FN function key at the lower left portion of the keyboard then hit the scroll key to turn it off. When it is turned on if you press the letter i you get the number 5. If you press the letter O you get the number 6.

Notice that the numbers on the keys that have letters are a different color than the letters (blue most times). That means you have to Press and Hold the blue FN function key at the lower left portion of the keyboard then hit the key with the same color if you want the colored representation to happen.

Some laptops will use a Square Box instead of the blue colors on the keys. In that case you have to press and hold the key a the lower left portion of the keyboard that has the square box, then hit the key you want.

check if the problem looks zig zag looking or it its not present in the PIP window. If so this may be an issue with the hypermodule - you can google TV repair Kits to find parts.

Welcome to FixYa!

look for the NumLk key in color blue, then press and hold fn then press the NumLk key that is in color blue.

fn + numlk (color blue) will lock/unlock numbers in color blue.

Thanks for using FixYa.
Jas

Try booting it into single-user mode holding down Command(Apple) and S buttons when powering up. Then in terminal console, use chkdsk -fy. Use it and use it again until comes back with something like "Volume appears to be OK". Then use command: mount -uw / and then type reboot and try booting normally.
If it does not fix your problem, it's most likely a hardware issue (logic board / graphics card), and you should take it to an Apple Authorized Service Provider.
-juuko

YOU may have two problems, 3 d picture or letters suggests convergence problem, Tell me more, all inputs have no function?

The more you tell me the better I can help.

I am expert with these sets and know them well.

SD TECH

http://forums.palm.com/t5/Support-Downloads/Palm-Centro-ROM-Update-for-Freezing-Issue/td-p/165101

Pressing the # key changes the text entry mode

Without an original remote, I'm afraid my friend, not much

color shadows on numbers or letters indicate a possible convergence problem.. might be a crt deflection problem.