diff --git a/en/faq.md b/en/faq.md index 165f69f5d7a37b6113069806d4c6ffef21e42e71..5d037bdffca81e74531e564b59da986886532c5b 100644 --- a/en/faq.md +++ b/en/faq.md @@ -48,4 +48,39 @@ First the badge needs to be ejected safely, then it needs to be restartet and pu The device should not be mounted. Now `lsblk` can help with finding the correct blockdevice. Then you can check the filesystem with `fsck /dev/sdX` (replace `sdX` with the correct device). If neccessary the tool will ask if the "dirty bit" should be removed, this needs to be answered with yes. -After this, the problem should be solved. \ No newline at end of file +After this, the problem should be solved. + +## Help! My Display is not working / it cracked +During camp we discovered that the badge display is one of the parts that easily gets damaged. +If you get a crack due to a mechanical crash or similar incident you have to replace your display. +This guidance shows you how to do this: +**Step 0:** Disconnect the battery with a pair of tweezers. +**Step 1:** The display sticks to the Harmonic board with two small double sided glue points (like the one you placed on +the backside to mount your battery). So careful lift the broken display with a pair of tweezers from the right side upwards. +Make sure that you under no circumstances lift the display to an extent so that the flex PCB of the display rips off +one or more solder pads from the harmonic PCB. Otherwise you would not be able to rework your Harmonic! +**Step 2:** Carefully remove the glue points from the Harmonic PCB. +**Step 3:** Apply a larger amount of solder with your solder iron. For this step you want to use your largest +solder tip. Try to apply heat to all pins of the flex pcb at the same time. Slowly and carefully apply an +upward force to lift the flex pcb. If all of the pins are heated the flex pcb will come off the Harmonic board. +**Step 4:** Use a desolder wire to remove the rest of the solder from the Harmonic pcb. Be careful and make +sure not to damage the board by ripping off one of the pads. +**Step 5:** Place your new display in the right orientation onto your Harmonic board. Make sure that the small +holes of the display flex pcb and the Harmonic board pcb align. At this stage the metal can part of the display +(bottom side) will point upwards. +**Step 6:** Apply solder on the display flex pcb pins. +**Step 7:** Visually check the connections and make sure that there are no shorts between the pins. +**Step 8:** Apply two glue points to the Harmonic pcb (one directly over the blanc pins of the flex pcb to +isolate them to the metal can of the display and one on the right side of the display pcb marking). If you don't +have those glue points we used, you also can make use of standard double-sided tape. +**Step 9:** Flip the display over end carefully press the display to the Harmonic pcb. Make sure that the +force does not destroy the LCD. You can apply the force at the edges of the display. Also make sure that the LCD is +in its right position and aligned with the rectangle on the pcb. It's easy to produce shorts on the components on the +right edge of the LCD. +**Step 10:** Connect the battery and switch on the badge + +The LCD can be bought at AliExpress: https://de.aliexpress.com/item/4000018872259.html + + + +