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CAT S22 Flip Motherboard Replacement

Introduction

This guide will go over the replacement of the motherboard for the CAT S22 Flip. The motherboard is the component that holds all the pieces together.

A motherboard that is experiencing problems can cause no power though the device, parts not working properly and overheating.

To confirm that the motherboard is the issue, check the CAT S22 Flip Troubleshooting page

What you need

  1. CAT S22 Flip Motherboard Replacement, Battery: step 1, image 1 of 1

    • Unscrew the large screw on the back of the phone using a flathead screwdriver or coin.

    • The screw will always be completely unscrewed after 4 full counter-clockwise rotations.

    • The screw cannot be completely removed so that you can’t lose the screw.

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  2. CAT S22 Flip Motherboard Replacement: step 2, image 1 of 1

    • There is a slot on the upper left side of the back plate to insert the Spudger.

    • Use a spudger to pry up the back plate.

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  3. CAT S22 Flip Motherboard Replacement: step 3, image 1 of 1

    • There is a slot to insert a spudger at the bottom of the battery.

    • Use a spudger to lift the battery out of the phone.

    • Do not operate on a devise with a swollen battery. Do not dispose of a swollen battery into general waste systems. You can dispose of the batteries with a qualified technician or facility.

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  4. CAT S22 Flip Motherboard Replacement, Motherboard: step 4, image 1 of 1

    • Remove the six 3.8 mm-long screws from the back frame using a J00 screwdriver.

    • Remove the two 3.8 mm-long screws with rubber washers using a J00 screwdriver.

    • Remove the four 2.4 mm-long screws from the back frame using the J00 screwdriver.

    • One of the short screws has a warranty sticker; you must pierce or remove the sticker to continue.

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  6. CAT S22 Flip Motherboard Replacement: step 5, image 1 of 1

    • Use the spudger to remove the back phone frame from the main frame.

    • There is now nothing holding the side power and volume buttons in place. We suggest you place these off to the side.

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  7. CAT S22 Flip Motherboard Replacement: step 6, image 1 of 1

    • Use the flat end of a spudger to pry up and disconnect all four motherboard press connectors.

    • Repeat on the other 3 small ribbon cables.

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  8. CAT S22 Flip Motherboard Replacement: step 7, image 1 of 3 CAT S22 Flip Motherboard Replacement: step 7, image 2 of 3 CAT S22 Flip Motherboard Replacement: step 7, image 3 of 3

    • Placing the Spudger at one end of the metallic connector of the daughterboard ribbon, apply a light upward pressure. The connector should slightly loosen from the motherboard, but not completely disconnect.

    • Move the spudger across the bottom of the connector, apply a rhythmic upward force as you go. The ribbon cable should disconnect.

    • If the daughterboard ribbon cable does not disconnect, repeat the previous instruction until it does. Do not apply too much upward force or use the motherboard as leverage even if the ribbon cable doesn’t disconnect.

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  9. CAT S22 Flip Motherboard Replacement: step 8, image 1 of 1

    • Dislodge the red seal from the channel. It should be connected to the daughterboard ribbon cable.

    • Lift up the daughterboard ribbon cable and the red seal out of the way from the motherboard.

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  10. CAT S22 Flip Motherboard Replacement: step 9, image 1 of 1

    • Lift up the remaining 4 ribbon cables.

    • Unscrew the four motherboard screws from the phone using a J00 screwdriver.

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  11. CAT S22 Flip Motherboard Replacement: step 10, image 1 of 2 CAT S22 Flip Motherboard Replacement: step 10, image 2 of 2

    • Locate the black lip of the phone frame. Use the spudger to move the motherboard away from the frame lip.

    • Then use the spudger to gently pry up the motherboard.

    • Do this carefully; you could break the motherboard.

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Conclusion

To reassemble your device, follow these instructions in reverse order with the exception of the ribbon cables. Use your finger to apply downward pressure, without using the spudger.

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Ariel

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University of North Texas, Team 2-5, Harold Fall 2025 Member of University of North Texas, Team 2-5, Harold Fall 2025

UNT-HAROLD-F25S2G5

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