Repairing cracked LCD on Canon Speedlight 430EX II

Member-Contributed Guide

Member-Contributed Guide

An awesome member of our community made this guide. It is not managed by iFixit staff.

This guide explains how to replace an LCD in a Canon Speedlight 430EX II flash. This guide requires advanced skills similar to replacing LCD in iPhone/iPod.

  • Author: midiman127
  • Time required: 1 hour
  • Difficulty: Difficult

Edit Step 1 Before you Start  ¶ 

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Edit Step 1 Before you Start  ¶ 

  • My Speedlight 430EX II was still working perfectly with only the LCD display cracked. The back-light was also still working.

  • Order a genuine replacement part from www.DHcameras.com.

  • Make sure you have a very good set of tools. The screws on this flash are very soft and a none matching driver will strip them.

Edit Step 2 Remove Flash Base  ¶ 

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Edit Step 2 Remove Flash Base  ¶ 

  • Remove batteries

  • Remove the 4 screws at the bottom of the flash

  • Remove mounting cap on the side of the flash

  • Carefully unplug the socket from the circuit board.

Edit Step 3 Open Casing  ¶ 

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Edit Step 3 Open Casing  ¶ 

  • Turn the flash head 90º.

  • Remove both screws right below the 75 mark. These are the screws holding the smaller back casing in place.

Edit Step 4 Pry open Case  ¶ 

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Edit Step 4 Pry open Case  ¶ 

  • READ THIS!!!! This is not a "the bigger the hammer the smaller the problem" step. You mess this up and you will need to duck-tape your flash back together. Also...: make sure you don't snap a plastic tool.

  • Looking flat into the opening you should see a metal part far in.

  • With a flat driver try to get between the plastic casing and this metal part to pry it out of the locking notch.

  • Image 3 illustrates the metal tab you need to press down for the side to open.

  • One more time: Make sure you are getting between the casing and the metal tab. Inserting and twisting a small screw driver worked for me after a few tries.

Edit Step 5 Unplug Wires  ¶ 

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Edit Step 5 Unplug Wires  ¶ 

  • Remove front casing with infrared sensor by removing one plug.

  • Detach 3 wires going from flash head to circuit board.

  • Remove brown and yellow wire from circuit board connecting the battery case.

Edit Step 6 Access LCD Circuit Board  ¶ 

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Edit Step 6 Access LCD Circuit Board  ¶ 

  • Gently pull flat band out of the circuit board mount. You might use the pliers but don't bend the band.

  • Move the 3 wires out from the gap between the casing and circuit board.

  • First: White

  • Second: Orange

  • Third: Black. This is the one we need to free.

  • Now the back casing with circuit board should come lose. Only attached by the black wire.

  • Also pull out the 2 metal mounting plates.

Edit Step 7 Remove old LCD  ¶ 

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Edit Step 7 Remove old LCD  ¶ 

  • Remove 5 screws holding the circuit board.

  • Remove screw holding metal tab. The screw is different than other 5. Make sure you leave it in the tab.

  • Remove screw holding plastic cap. Keep screw in the cap as it is a different size.

  • Take the circuit board out of the casing flipping it over.

  • There is a clear plastic plate (red) between the LCD and the circuit board. It might fall out. It is used to distribute the back-light.

  • Pull the old LCD off carefully. Make sure not to tear the rubber band (green). This is used to transfer the signals from the board to the LCD.

Edit Step 8 Install new LCD  ¶ 

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Edit Step 8 Install new LCD  ¶ 

  • Cut the side of the plastic wrapping of the new LCD. Slide it out of the plastic bag directly into position. Make sure you don't touch surface with your fingers.

  • There are 2 tabs (red) the new LCD needs to slide under.

  • Now place the clear plastic plate on top of the new display. MAKE SURE it is in the correct orientation. In the image the BLUE notch is a bit larger than the orange one.

  • Press the edges of the plastic lightly and it will snap into the case.

  • Remove the rubber band gently from the old LCD and place it into the groove (image 3, red). Make sure it is aligned correctly.

Edit Step 9 Re-assemble and Test  ¶ 

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Edit Step 9 Re-assemble and Test  ¶ 

  • Place circuit board back into the casing and attach all screws.

  • If positioned correctly the rubber band will make connection between the new LCD and the board.

  • Push the wires back between the side casing and the circuit board. The order is now reversed: 1st Black, 2nd Orange, 3rd White.

  • Re-attach all connectors onto the circuit board except the flash base.

  • Insert batteries and hold the cap closed with your fingers. It will not snap closed until the casing is back together.

  • Turn on the flash and check if the LCD works. Push the back-light button (above Pilot) to make sure it works.

  • After the test remove batteries.

Edit Step 10 Close Casing  ¶ 

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Edit Step 10 Close Casing  ¶ 

  • Re-attach the front casing wire for the infrared sensor.

  • Make sure the plastic foil is back in place the correct way around.

  • Put the flash head back between casing halves and snap them together.

  • Attach them with the top screws byt the 75 marks.

Edit Step 11 Final Test and Done  ¶ 

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Edit Step 11 Final Test and Done  ¶ 

  • Run one more test by inserting batteries. The battery cap should now snap closed.

  • Turn the flash head and make sure all mechanics work including the tilt.

  • Re-attach the wire of the flash foot and put in the 4 screws.

  • Congratulations!!! You just fixed your speed light LCD.

To reassemble your device, follow these instructions in reverse order.

For more information, check out the Canon Speedlite 430EX II device page.

Required Tools

iFixit Tech Knife

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Comments Comments are onturn off

Whohoo, great! My flash has a new display. THANK YOU!!!

alizr hort, · Reply

My backlight did not work during the first try in step 9, but it did after putting it all back together. Thanks a lot!

alizr hort, · Reply

Did you find out what went wrong with step 9?

midiman127,

Many thanks for this superb Step By Step. It worked! Keep up the great work.

cyberK, · Reply

You are very welcome. I like to see other very bold people out there fixing stuff!

midiman127,

thank you for the instruction, I just fixed my screen! It took me a while unlocking the metal pin, I made some marks on the cover, but that is ok. After that everything is quite straightforward.

Chang Liu, · Reply

Glad I was able to get it done, but when I read the directions I missed out on the part of pulling the battery holder out of the front element. The black wire connecting to the circuit board most visible in the last image of step 6 had a much shorter wire on mine and it actually disconnected. Thankfully after much trying and a bit of wiggling to get more length I was able to get it sorted.

Thanks for the tutorial, would not have been able to get it done without it.

Morgan Murphy, · Reply

Thanks for all the effort, it worked great. My flash is as new. Many Thanks !

Marcoi, · Reply

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