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If your Sony Xperia Z3 smartphone shows no image but the backlight is working, there may be a problem with the phone’s logic board. This problem can occur because of failed screen replacement attempts. Use this guide to repair your device.
Alternatively, see this Sony Xperia Z3 no image after screen replacement YouTube video for help micro-soldering the logic board.
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Sony Z3 no image after screen replacement only backlight Hardware Repair
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Heat the back cover of your Xperia Z3 to loosen the adhesive underneath.
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Lift up the back cover with a suction handle and put an opening pick in the gap.
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Move the pick carefully around the edges to loosen the adhesive on every side of the phone.
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crwdns2935267:0crwdne2935267:0Tweezers$4.99
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When the edges of the cover are free from adhesive, tilt it to allow access to the battery tabs.
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Use tweezers to pull the two black adhesive strips out of the phone but don't pull just yet.
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Gently pull out both of the adhesive tabs out of the phone, parallel to the rear cover.
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After pulling out the adhesive tabs, you can lift the back cover and remove it.
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Unplug the battery flex connector.
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Use a tweezer to gently pull off the adhesive strip on the bottom part of the battery.
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Use a spudger on the left side of the frame to lever out the battery.
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Remove the battery.
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Use your fingers or the flat end of a spudger to unclip the cables holding the logic board in place.
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Use your fingers to remove the phone's logic board.
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Visually inspect the logic board.
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crwdns2935267:0crwdne2935267:0Tweezers$4.99
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Apply a small amount of flux to the motherboard's filters.
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Wait at least 30 seconds for the flux to clean the surfaces.
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Use a pair of micro-soldering tweezers to remove the metal square from the filters.
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Apply solder to each of the three sets of four pins now exposed on the logic board.
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After each solder, apply a small amount of flux to the new connection to clean the connection.
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Check that each of the connections covers all four of the pins in each set.
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Re-form the solder or add additional solder if the connection does not cover all four pins.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
crwdns2947412:02crwdne2947412:0
I have a z3 single, it turns on the backlight but not the image what to do? procedure above did not work …
i &&^&@@ my display
