Introduction

This guide will allow you to replace a defective motherboard for the Dell Inspiron 17-5755. Please ensure that the battery is removed before performing this replacement.

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  • Make sure the computer has been shut down, and isn't plugged into an outlet before attempting to remove the battery.

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Image 1/2: Slide the latch to the left until you hear a "click". This indicates that the battery has been released. Image 2/2: Slide the latch to the left until you hear a "click". This indicates that the battery has been released.
  • Find the battery release latch on the bottom side of the computer.

  • Slide the latch to the left until you hear a "click". This indicates that the battery has been released.

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  • Safely remove the battery from the laptop.

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  • Open the display of the laptop as far as possible, and locate the tabs which secure the keyboard to the laptop.

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  • Use a plastic opening tool to gently release the tabs that secure the keyboard to the laptop.

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  • Carefully lift the keyboard from the laptop, being mindful of any attachments that it may have.

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Image 1/3: Afterwards, carefully detach the backlight cable from the laptop. Image 2/3: Afterwards, carefully detach the backlight cable from the laptop. Image 3/3: Afterwards, carefully detach the backlight cable from the laptop.
  • Lift the zero insertion force (ZIF) tab that secures the keyboard back light ribbon cable

  • Afterwards, carefully detach the backlight cable from the laptop.

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Image 1/3: Afterwards, carefully slide the cable out of its slot. Image 2/3: Afterwards, carefully slide the cable out of its slot. Image 3/3: Afterwards, carefully slide the cable out of its slot.
  • Gently release the ZIF tab that secures the keyboard ribbon cable to the laptop.

  • Afterwards, carefully slide the cable out of its slot.

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  • Now that the keyboard is detached from the laptop, you may safely remove it.

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  • Use a Phillips #0 screwdriver to unscrew the two 8mm screws which secure the base cover.

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  • Locate the tabs that hold the base cover to the laptop and use a plastic opening tool to gently release the base cover.

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  • Now with the base cover removed, you may lift it off of the laptop and continue.

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  • Disconnect the hard drive ribbon cable from the laptop by lifting the latch which secures it.

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  • Use a Phillips #0 screwdriver to remove the four 8mm screws which secure the hard drive assembly to the laptop.

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  • Carefully remove the hard drive and its assembly from the laptop.

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Image 1/3: After removing the screw, remove the wireless card bracket, along with the antenna cables secured to the wireless card. Image 2/3: Afterwards, you may slide and remove the wireless card from the motherboard. Image 3/3: Afterwards, you may slide and remove the wireless card from the motherboard.
  • Remove the 3mm screw which secures the wireless card bracket.

  • After removing the screw, remove the wireless card bracket, along with the antenna cables secured to the wireless card.

  • Afterwards, you may slide and remove the wireless card from the motherboard.

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Image 1/3: Slide and remove the memory module afterwards. Image 2/3: Slide and remove the memory module afterwards. Image 3/3: Slide and remove the memory module afterwards.
  • Gently spread apart the securing clips on each end of the memory-module slot until the memory module pops out.

  • Slide and remove the memory module afterwards.

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  • Use a plastic opening tool to gently pry the CMOS battery found at the bottom right of the laptop out of the socket.

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Image 1/3: Turn the computer over and using a plastic opening tool, push the optical-drive assembly out of the optical drive bay. Image 2/3: Afterwards, safely pull the optical-drive assembly out of the optical-drive bay. Image 3/3: Afterwards, safely pull the optical-drive assembly out of the optical-drive bay.
  • Use a Phillips #0 screwdriver to remove the 3mm screw which secures the optical-drive assembly to the computer base

  • Turn the computer over and using a plastic opening tool, push the optical-drive assembly out of the optical drive bay.

  • Afterwards, safely pull the optical-drive assembly out of the optical-drive bay.

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Image 1/3: Lift the latch securing the optical drive ribbon cable, and disconnect it from the motherboard. Image 2/3: Afterwards, use a Phillips #0 screwdriver to remove the four 5mm screws. Image 3/3: Afterwards, use a Phillips #0 screwdriver to remove the four 5mm screws.
  • Turn the computer over

  • Lift the latch securing the optical drive ribbon cable, and disconnect it from the motherboard.

  • Afterwards, use a Phillips #0 screwdriver to remove the four 5mm screws.

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  • Turn over the laptop, and safely disconnect the speaker cable.

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  • Remove the antenna cables from the routing guides on the computer base.

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Image 1/2: Afterwards, safely pry the  computer base from the palm rest assembly using a plastic opening tool. Image 2/2: There are 3 different screws used: Three 2mm screws on the edge of the optical drive, two 3mm screws located where the battery was, and ten 8mm screws.
  • Use a Phillips #0 screwdriver to remove the 15 screws that secure the computer base to the palm rest assembly.

  • Afterwards, safely pry the computer base from the palm rest assembly using a plastic opening tool.

  • There are 3 different screws used: Three 2mm screws on the edge of the optical drive, two 3mm screws located where the battery was, and ten 8mm screws.

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  • Use a Phillips #0 screwdriver to remove the 5mm screw that secures the I/O board to the palm-rest assembly.

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Image 1/3: Afterwards, lift the ZIF latch and disconnect the I/O-board cable from the I/O board. Image 2/3: Afterwards, lift the ZIF latch and disconnect the I/O-board cable from the I/O board. Image 3/3: Afterwards, lift the ZIF latch and disconnect the I/O-board cable from the I/O board.
  • Lift the I/O board and turn it over.

  • Afterwards, lift the ZIF latch and disconnect the I/O-board cable from the I/O board.

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Image 1/3: Use a Phillips #0 screwdriver to remove the heat-sink screws in sequential order, as indicated by the numbers on the heat-sink assembly. Image 2/3: Afterwards lift the heat-sink assembly off the motherboard. Image 3/3: Afterwards lift the heat-sink assembly off the motherboard.
  • Disconnect the fan cable from the motherboard.

  • Use a Phillips #0 screwdriver to remove the heat-sink screws in sequential order, as indicated by the numbers on the heat-sink assembly.

  • Afterwards lift the heat-sink assembly off the motherboard.

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Image 1/3: Lift the latches for the power button board cable and disconnect it along with the touchpad cable from the motherboard. Image 2/3: Lift the latches for the power button board cable and disconnect it along with the touchpad cable from the motherboard. Image 3/3: Lift the latches for the power button board cable and disconnect it along with the touchpad cable from the motherboard.
  • Turn the computer over and open the display as far as possible.

  • Lift the latches for the power button board cable and disconnect it along with the touchpad cable from the motherboard.

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Image 1/1: Proceed to lift the latch which secures the ZIF display cable to the motherboard.
  • Close the display and turn the computer over.

  • Proceed to lift the latch which secures the ZIF display cable to the motherboard.

  • Disconnect the display cable from the motherboard.

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Image 1/2: Afterwards, carefully peel the I/O board cable off the palm-rest assembly. Image 2/2: Afterwards, carefully peel the I/O board cable off the palm-rest assembly.
  • Use a Phillips# 0 screwdriver to remove the 3mm screw that secures the motherboard to the palm-rest assembly.

  • Afterwards, carefully peel the I/O board cable off the palm-rest assembly.

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Image 1/3: Lift the latch to disconnect the I/O-board cable from the motherboard. Image 2/3: Lift the latch to disconnect the I/O-board cable from the motherboard. Image 3/3: Lift the latch to disconnect the I/O-board cable from the motherboard.
  • Turn the motherboard over.

  • Lift the latch to disconnect the I/O-board cable from the motherboard.

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Image 1/3: Afterwards you may safely remove the motherboard from the laptop. Image 2/3: Afterwards you may safely remove the motherboard from the laptop. Image 3/3: Afterwards you may safely remove the motherboard from the laptop.
  • Disconnect the power-adapter port cable from the motherboard.

  • Afterwards you may safely remove the motherboard from the laptop.

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Conclusion

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

Jeff

Member since: 02/15/2017

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USF Tampa, Team S6-G1, Lacy Spring 2017 Member of USF Tampa, Team S6-G1, Lacy Spring 2017

USFT-LACY-S17S6G1

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