Sony Alpha NEX-3N Mainboard Replacement
Terrance and one other contributor
Last updated on Nov 25, 2022
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What you need
Tools
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Remove the battery and SD card from the bottom of the camera before starting any disassembly. This is not only to keep your image files safe, but to also prevent getting shocked by electronic components inside the camera.
Ask FixBot
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On the right side, remove 1 M1.4x3.7 screw marked with a yellow box.
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On the left, remove 3 M1.4x3.7 screws also marked by the yellow boxes.
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On the bottom side, remove 5 M1.4x3.7 screws, including 2 in the battery bay. 2 of them are in this photo; you can find them.
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Pop open the flash.
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In flash area, remove 1 (one) M1.4x3.8 black screw, marked by the blue box.
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Remove the LCD hinge cover, by sliding it to the left.
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Remove the back cover, which is actually just a plastic frame.
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Remove 1 M1.4x2 screw marked by the blue box.
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Remove another M1.4x2 screw. (sorry for the angle of the photo!)
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Loosen the LCD assembly with caution!
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Release the FPC cable, as the connector is a flip type.
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After unscrew 4pcs screw, you will remove the steel black plate, then slowly pull the black frame there to see the ribbon stripe.
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Slowly pull the very fragile ribbon lock, which I marked with the blue boxes. Around just 1mm to unlock the ribbon. Unfortunately, I broke mine.
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You can see the ribbon has already pulled out. But be careful with the other 2 ribbons when you try to pull out this one.
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The the circle marker that shows others ribbons you need to be careful. Goodluck!
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Slide the flash assembly backwards with caution.
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Detach flash FPC by pulling it out of the socket.
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Then remove the flash assembly.
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Remove 2 ST1.7x5 screws from inside the battery bay. (one of them not shown, deeper inside) insert screw driver through a hole in the shielding cover.
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Pop the grip off. From back, push to the right, then it flies forward.
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Sensor power, flip
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Sensor signal, flip
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Shutter, pull
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Lens contacts, pull. Did I mention that Sony makes world's most brittle FPC?
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Whatever, pull
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Whatever, pull
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Shutter charger motor FPC, (backside, pull out)
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Flip the Mainboard up
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Pull out one more FPC
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Discharge then desolder 4 wires.
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To reassemble your device, follow these instructions in reverse order.
