My Flip Camera Model U2120 stopped turning on. If I plug it into the USB port the screen lights up and says "Connected". Once I remove it then try to turn the camera on it still does not work. I have replaced the batteries and tried using the rechargeable batteries and still not luck. Any Ideas?

SOURCE: Camera software corrupted??

I had the same problem with my flip mino HD. Here are the steps I took to fix it.

1. Adjust the power options on your laptop to ensure it does not sleep/hiberate ever.
2. Reset the camcorder by inserting a paperclip into the hole in the tripod mount. Hold the paperclip in there for about seven seconds.
3. Then immediately plug the flip into the cpu.
4. You may not see anything besides the little blinking white light on the USB arm for a while (about 30 minutes maybe) but leave it in.
5. Eventually it should spring to life and show the recharging battery on the little screen (the Flip Share program may start too.)
6. Leave it charging until the little white light stops flashing - full charge about 3 hours.
7. You can then remove the flip and change the power settings back to normal.

SOURCE: Flip Video Camera Won't Start Up

Flip support helped me solve this problem. Their procedure is to take the batteries out of the camera and leave it sit for 48 hours. After 48 hours, put different batteries into the camera and turn it on. Your problem should be solved. It worked for me the first time and now I currently doing it for a second time. Waiting for 48 is no fun, but at least it works and fixing it is not expensive. No explanation was given to me about the problem.

SOURCE: Flip Ultra - freezes at initial Flip screen - will not shut off

I found a fix that worked for mine.
It was doing the same thing, freezing at the "Flip" screen and would not turn off. I did the remove the batteries deal. It worked once but issue reoccured 2 months later and the battery fix didn't fix it.
What did fix it was...
With the camera off, hold down the Right Arrow button and the trash can button at the same time and turn the camera on.
A few seconds later, I was at the start recording screen!!

Good Luck!

SOURCE: Flip Video Won't Turn On

For the Flip Ultra - Take out batteries you should see a flat somewhat square piece of metal with a small black piece sticking up from it. Take a pencil and push the black piece down wait a few minutes then try turning your flip back on.

SOURCE: My Flip video Error code 17,2 - won't connect to software

I have the same problem, did the same things that the customer service said and it does not work. I had to return it. Customer service was no help. I think these are lemons.