My iMac's keyboard keeps typing "77777" on its own

[macpokerstars]

I have an 2009 iMac with its Mac keyboard (with keypad) and it starts randomly typing "777777777" until I press the Shift key, and then it stops for a while.

Also, the "7" key doesn't work on my keypad but it works with the "7" key above the y key.

Another thing: I can type the letter "i" but I can't type its capital letter "I" by using the normal left shift key. I have to use the caps lock for the capital i to work.

My right shift key doesn't work at all.

I noticed that when the 7's start to type, if I press down the metal part of my keyboard, it would slightly affect the typing of 7's, temporarily stopping it.

Any idea what this is and what I can do?

Thanks in advance

 

[DeltaMac]

I have an 2009 iMac with its Mac keyboard (with keypad) and it starts randomly typing "777777777" until I press the Shift key, and then it stops for a while.

Also, the "7" key doesn't work on my keypad but it works with the "7" key above the y key.

Another thing: I can type the letter "i" but I can't type its capital letter "I" by using the normal left shift key. I have to use the caps lock for the capital i to work.

My right shift key doesn't work at all.

I noticed that when the 7's start to type, if I press down the metal part of my keyboard, it would slightly affect the typing of 7's, temporarily stopping it.

Any idea what this is and what I can do?
..

You shouldn't need to struggle with your keyboard
When a few keys stop working, there's usually not a lot that you can do, except replace the keyboard. If your iMac was still in warranty, Apple would likely replace it, unless there was obviously a liquid spill, or other physical damage.
If you want to try to fix, you could pop off the offending key caps, to check for something underneath the keys. That might help, or you may not find anything, and it's simply some keys that are dying (the internal keyboard decoder may be failing).

 

[antman2x2]

Wow my keyboard has had the following items spilled into it during the last 2 years.

Milk, Arizona Iced Tea, Water and juice.

Still works!

 

[macpokerstars]

Weird, I think I solved it. I started hitting the back of the keypad behind the "7" key about a dozen times and now it works. Back to normal. Even the capital I works normally now...