"help" is displayed in data panel

This error indicates a memory problem.
The camera can't read or write data to the memory card. Try turning off and on the camera again, or take out and reinsert the memory card several times. Also remove and reinsert the battery.
It also can mean the memory card is not formatted, or there is a format error for an other reason. Format the internal memory or the memory card.
It also could mean the memory card is damaged and can't be used any more. Then you have to place a new memory card.

I hope something will help.
This is also in you user manual.

Try first removing battery and putting back.

For the TI-83 Plus Family, TI-84 Plus Family:

Caution: The resets described in these troubleshooting steps will cause a loss of applications, programs and data. If at all possible please create a backup using TI Connect first.

1. Try a new set of AAA batteries.
2. Adjust the contrast by pressing and releasing the 2nd key followed by pressing and releasing the up arrow; repeat as necessary. To adjust or lighten the display, use the down arrow.
3. Remove one of the AAA batteries. Press and hold the CLEAR key. While holding CLEAR, reinsert the AAA battery and then turn the calculator on. The calculator should display the message "RAM Cleared". Release the CLEAR key and then press it one more time to remove the message.
4. Remove one of the AAA batteries. Press and hold the DEL key. While holding DEL reinsert the AAA battery and then turn the calculator on. The calculator should display "Waiting...Please install calculator software now". Follow the instructions for the TI-83 family or TI-84 Plus family to reinstall the calculator operating system.
5. Remove all of the batteries including the round lithium battery for 5 minutes. After the 5 minute period, reinsert all of the batteries and turn the calculator on. Adjust the contrast if necessary.

This was suggest by TWC42 on Amazon. I tried it and it worked. Had the same issue with mine. Here's a fix that might work. Set batteries aside. Remove the 6 screws from the back with a small phillips. Lift off the back. Remove the 5 smaller screws holding the display in place. Insert the three batteries. If the display now shows a number without flickering, do not remove batteries. Carefully replace display, reinsert five screws. Place back on, reinsert 6 screws. Turn over, see if off/on works. Mine did!

The compatible batteries for this Camera are NP-FD1, NPBDL.

Please make sure that you're using compatible battery pack.

Remove and reinsert the battery pack, while the Camera is turned off.

Reset the Camera by removing the battery while the Camera is ON and reinsert the battery after a minute and turn on the Camera.

If the issue is not resolved the Camera needs to be serviced, as it will be the issue with the hardware part of the Camera.

It appears you have a defective camera body, warranty should cover it. Go to canonusa.com and contact their service dept.

Hope this helps out. Happy Thanksgiving!
Gom

TIPS:
1.)NEVER PUSH THE LENS IN AFTER CAMERA DIES, BUY A NEW BATTERY IMMEDIATLY AND TURN IT BACK ON, CLOSING THE LENS!

2.)NEVER USE AN AC ADAPTER, USE A RECHARGEABLE BATTERY OR A REGULAR BATTERY!

..to fix this...

Do as i say..

1.) Remove battery
2.) Remove front plate (screw driver may be needed)
3.) Check all gears, make sure they are correctly fitted in place)
4.) Move the gear manually to make the lens come out.
5.) keep it out, put the front plate back together.
6.) reinsert the battery, turn it on.


or...
1.) Remove the battery.
2.) Wait about 6-8 hours.
3.) Reinsert the battery.

or...
1.) Remove the battery.
2.) Try hooking it up through AC adapter, put correct voltage.
3.) Try turning it on.
4.) Remove AC adapter, reinsert battery.
5.) Turn it on.
If nothing happens just tell me..

Hope this may help;

Regards,
VOTIT

DONT FORGET TO RATE;

TIPS:
1.)NEVER PUSH THE LENS IN AFTER CAMERA DIES, BUY A NEW BATTERY IMMEDIATLY AND TURN IT BACK ON, CLOSING THE LENS!

2.)NEVER USE AN AC ADAPTER, USE A RECHARGEABLE BATTERY OR A REGULAR BATTERY!

..to fix this...

Do as i say..

1.) Remove battery
2.) Remove front plate (screw driver may be needed)
3.) Check all gears, make sure they are correctly fitted in place)
4.) Move the gear manually to make the lens come out.
5.) keep it out, put the front plate back together.
6.) reinsert the battery, turn it on.


or...
1.) Remove the battery.
2.) Wait about 6-8 hours.
3.) Reinsert the battery.

or...
1.) Remove the battery.
2.) Try hooking it up through AC adapter, put correct voltage.
3.) Try turning it on.
4.) Remove AC adapter, reinsert battery.
5.) Turn it on.

Hope this may help;

Regards,
VOTIT

DON'T FORGET TO RATE

sir, ur camera lens mechanically stucked or gears problum ,this is repairable

If an aperture of "00" is displayed on the camera's LCD panel, perform the following steps in order. Check after each step to see if the problem remains, and proceed to the next step if it does. (In some cases, you may see "Err 01" displayed on the LCD panel.) 1. Check if the lens is correctly mounted on the camera. If no lens is attached to the camera, "00" will be displayed for the aperture value. 2. Clean the lens contacts. Turn the camera's power switch to OFF, and then detach the lens from the camera to clean the contacts. Use a blower to blow away dust on the lens. Do not touch both the camera's or lens' electrical contacts with your fingers while cleaning the lens. Turn the power switch to ON again and check the aperture value displayed on the LCD panel. Refer to the Instruction Manual provided with your camera for instructions for detaching or mounting the lens. Also, prevent any foreign materials or dust from getting into the camera through the lens mount, and be sure not to damage the contacts. 3. Remove the battery pack. Turn the camera's power switch to OFF and remove the battery pack. Then reinsert the battery pack, and then turn the power switch to ON again.