Canon 100 d screen is blank seems to be frozen when trying to take a pitcure flash will pop but will get busy sign battery fully charged

When showing busy, most of the time the camera detected an error, but can't find out what is causing the error.
Try the normal "reset" method as follows:
Like a cold boot for a computer, the camera can be "rebooted"
follow the following steps:
Switch of the camera and remove the battery.
Remove the memory card and the lens. (if possible)
Recharge the battery. Wait till the indicator on the charger indicates the battery is fully charged.
Check all contacts, if they are clean and shiny. Contacts (from battery and memory card, only to be cleaned with a dry cloth or cotton swab(s).
Reinsert the battery, reinsert the memory card and re-attach the lens.
Then switch on the camera.
If this does not help, contact a certified Canon repair centre.

Does the little flash lightening bolt light up in the viewfinder to let you know the flash is fully charged? If it does, but when you push release it goes out and then comes on again in a few seconds that is the sign of a bad flash board.

Does the flash go all the way up?

Is the switch that is under the flash come all the way up (not stuck down)?

If your laptop appears to boot up and the hard disk LEDflashes, then the problem is probably a back light fault. This can be a faultyinverter or a faulty CCFL lamp. Please click on this link and follow myinstructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

This may sound obvious, but have you tried to make surer the battery is fully charged and then see'ing if it still does this? The reason I suggest this is that I had a similar problem and when I fully charged the battery this problem went away. I tend to keep an extra battery (fully charged) plus the charger on hand at all times.

Maybe you drop your battery and they have electronic components inside that could be spoiled, if is that the case, try to change the battery, it appeares to me that the ammount of current the battery is sending to the component is very low even thoe it seems to be fully charged that's why the camera is unable to display anything and the "busy" warning is blinking all the time, I hope you find this usefull.

belie e this is a flash error. will not pop up or blocked.

There is a battery charge level sensor in the DC/DC internal converter board.

It seems that just started to fail such board.

You can try with other brand or type of AA batteries.

If still you have the same problem, you will need to have replaced the DC/DC converter board on your camera. This means a Camera repair shop service on it.

Best regards,

please make sure the batteries you are using are genuine.

Could be that the battery is weak, and should be replaced as it is not holding a charge.

There are two versions of this problem: 1. The flash does not pop-up. 2. The flash does pop-up.

Here’s the fix to the err05 msg when the flash does pop-up. This will work on the XTi and perhaps on similar Canon cameras:

The pop-up flash has two legs. Look at the pivot point of the right leg (”right” when looking into the lens). Just in front of the pivot is a very small spring-load pin on the “roof” of the camera body.
This pin is the sensor that tells the camera the state of the flash. The pin is pushed down when the pop-up flash is closed and is suppose to quickly spring up when the flash is opened. Problem is, the pin sometimes gets dirty and drags. When it is slow to spring up … you get the err05 message.

Fix: Take a small jeweler’s screwdriver and dip the tip in isopropyl alcohol. (Don’t use any other solvent unless it’s designed for cleaning electronic parts!) Then touch the screwdriver tip to the pin. Do this several times until the pin area is nicely wet. Then push the pin up and down until it is able to spring up quickly.

Enjoy.