When your Dell Latitude 7490 laptop computer begins appearing up, it may be irritating. However earlier than you hand over and take it to an expert, there are some things you possibly can attempt to repair it your self. One widespread difficulty is a defective battery, which may be simply changed. One other widespread difficulty is a clogged fan, which may be cleaned with a can of compressed air. For those who’re feeling somewhat extra adventurous, you possibly can even attempt to substitute the laborious drive or the RAM.
On this article, we’ll present you tips on how to take aside your Dell Latitude 7490 laptop computer so that you could carry out these repairs your self. We’ll present step-by-step directions with clear pictures, in order that even learners can comply with alongside.
Earlier than you start, make sure that to energy down your laptop computer and unplug it from any energy sources. You must also take away any exterior units, similar to a USB drive or a mouse. As soon as you have executed that, you are prepared to start out taking aside your laptop computer.
Important Instruments and Precautions
Earlier than embarking on the disassembly of your Dell Latitude 7490, it’s essential to assemble the suitable instruments and observe crucial precautions to make sure a profitable and protected process. Here is a complete record of what you will want and the precautions to take:
Important Instruments:
To disassemble the Dell Latitude 7490, you’ll require the next instruments:
| Important Instruments |
|---|
| Anti-static wrist strap |
| Precision screwdriver set (Phillips #00 and Torx T5) |
| Plastic spudger or pry software |
| Tweezers |
| Magnetic mat or tray |
| ESD (Electrostatic Discharge) bag (elective) |
Precautions:
To attenuate the chance of harm to your laptop computer or damage to your self, please adhere to the next precautions:
- Floor your self: Put on an anti-static wrist strap or contact a grounded steel object earlier than dealing with the laptop computer to stop electrostatic discharge (ESD).
- Energy down and disconnect: Make sure that your laptop computer is turned off and all cables are disconnected earlier than beginning disassembly.
- Work on a clear, flat floor: Select a well-lit and clutter-free workspace to keep away from unintended spills or lack of small parts.
- Keep away from extreme drive: Use mild drive when eradicating parts to stop harm. For those who encounter resistance, reassess the scenario and determine the trigger.
- Maintain monitor of screws: Place screws in a magnetic mat or tray and preserve monitor of their unique places to make sure correct reassembly.
Getting ready the Laptop computer
Earlier than commencing the disassembly course of, make sure the laptop computer is powered down and all exterior peripherals are disconnected. Place the laptop computer the wrong way up on a clear and steady floor. Find the six screws securing the bottom cowl and take away them utilizing a Phillips #00 screwdriver.
Lifting the Base Cowl
As soon as the screws are eliminated, fastidiously elevate the bottom cowl by inserting a plastic pry software or your fingernails into the seam alongside the sting. Use warning to keep away from damaging the plastic clips holding the duvet in place. Gently elevate the duvet till it’s utterly separated from the laptop computer chassis.
Warning: Deal with the bottom cowl with care to stop harm to the interior parts, such because the battery or cooling fan.
Word: The bottom cowl might include further tabs or clips that require mild maneuvering to launch. Use a plastic pry software to securely disengage any remaining clips.
Eradicating Exterior Elements
Earlier than disassembling the interior parts of the Dell Latitude 7490, it’s essential to take away all exterior parts to make sure security and forestall harm.
Step 1: Detach the Energy Wire
Find the facility wire linked to the laptop computer and gently unplug it from the facility supply. All the time maintain the plug, not the wire, to keep away from damaging the wires.
Step 2: Take away the Battery
Slide the battery launch latch situated on the underside of the laptop computer. Maintain the battery firmly and slide it out of its compartment.
Step 3: Take away the SIM Card and microSD Card (if relevant)
- Find the SIM card slot on the aspect of the laptop computer and insert a SIM ejector software (or a paperclip). Press down gently to eject the SIM card.
- If the laptop computer has a microSD card slot, insert a microSD card ejector software (or a paperclip) and press down gently to eject the microSD card.
| Part | Location | Removing Methodology |
|---|---|---|
| Energy Wire | Again of laptop computer | Unplug from energy supply |
| Battery | Backside of laptop computer | Slide launch latch and slide out battery |
| SIM Card | Aspect of laptop computer | Insert SIM ejector software and press down |
| microSD Card (if relevant) | Aspect of laptop computer | Insert microSD card ejector software and press down |
Eradicating the Keyboard
To start, you will must take away the again cowl of the laptop computer. That is executed by eradicating the screws that maintain it in place. As soon as the again cowl is eliminated, you will must disconnect the battery after which take away the speaker meeting.
With the speaker meeting eliminated, you will have entry to the screws that maintain the keyboard in place. Take away these screws after which fastidiously elevate the keyboard out of the laptop computer.
Be Mild with the Keyboard Ribbon Cable
| Step 1: Uncover the Ribbon Cable | Find the ribbon cable connecting the keyboard to the motherboard. It is normally lined by a small plastic protecting cowl. Use a pry software to softly elevate the duvet and expose the ribbon cable. |
|---|---|
| Step 2: Disconnect the Ribbon Cable | Flip the small lever on the finish of the ribbon cable’s connector. This lever secures the cable in place. As soon as the lever is flipped, gently pull the cable out of the connector. |
| Step 3: Maneuver the Keyboard | With the ribbon cable disconnected, now you can fastidiously elevate the keyboard out of the laptop computer body. Maneuver it gently to keep away from damaging the encircling parts or the ribbon cable. |
Detaching the Battery
To detach the battery from the Dell Latitude 7490, comply with these steps:
1. Make sure that the laptop computer is powered off and all cables are disconnected.
2. Slide the battery launch latches situated on the underside of the laptop computer in the direction of the middle.
3. Elevate the battery barely from the again of the laptop computer.
4. Slide the battery out of the compartment at an angle.
5. Disconnect the Battery Cable:
Earlier than utterly eradicating the battery, it is very important disconnect the battery cable to stop any harm to the motherboard or the battery.
To disconnect the battery cable, comply with these further steps:
- Find the battery cable connector on the suitable aspect of the battery compartment.
-
Utilizing a pair of tweezers or your fingers, fastidiously pry open the connector latch and pull the
battery cable free from the connector.
Warning: Deal with the battery cable with care to keep away from damaging the fragile wires.
6. As soon as the battery cable is disconnected, you possibly can utterly take away the battery from the laptop computer.
Dismantling the High Bezel
1. Take away the rubber toes
Use a spudger to pry up the rubber toes on the underside of the laptop computer. There are six toes in whole.
2. Take away the screws beneath the toes
There are six screws beneath the rubber toes. Take away them utilizing a T5 Torx screwdriver.
3. Pry up the underside bezel
Use a spudger to pry up the underside bezel, ranging from the again of the laptop computer. Work your method across the edges till the bezel is free.
4. Elevate the underside bezel away
As soon as the bezel is free, elevate it away from the laptop computer. Watch out to not harm the wires connecting it to the motherboard.
5. Disconnect the webcam cable
Use a spudger to disconnect the webcam cable from the motherboard. The cable is situated on the suitable aspect of the laptop computer.
6. Pry up the highest bezel
Use a spudger to pry up the highest bezel, ranging from the again of the laptop computer. Work your method across the edges till the bezel is free.
| Screw Measurement | Amount | Location |
| M2x3 | 2 | Rear corners of the highest bezel |
| M2x4 | 6 | Alongside the perimeters and high of the highest bezel |
| M2x5 | 2 | Close to the entrance corners of the highest bezel |
7. Elevate the highest bezel away
As soon as the bezel is free, elevate it away from the laptop computer. Watch out to not harm the wires connecting it to the motherboard.
Eradicating the Motherboard Meeting
To take away the motherboard meeting, comply with these steps:
-
Disconnect the battery cable from the motherboard.
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Take away the 2 screws that safe the motherboard meeting to the system board.
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Disconnect the next cables from the motherboard:
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Energy cable
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Show cable
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USB cables
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Audio cable
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Digital camera cable
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Keyboard cable
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Touchpad cable
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Fan cable
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Speaker cable
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Microphone cable
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Elevate the motherboard meeting out of the system board.
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Place the motherboard meeting on a clear, flat floor.
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Take away the next screws from the motherboard meeting:
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Two screws that safe the battery connector
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Two screws that safe the speaker
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Two screws that safe the fan
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Two screws that safe the microphone
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Two screws that safe the keyboard
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Two screws that safe the touchpad
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Two screws that safe the show
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Two screws that safe the facility swap
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Two screws that safe the USB ports
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Two screws that safe the audio ports
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Two screws that safe the digicam
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Fastidiously take away the next parts from the motherboard meeting:
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Battery connector
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Speaker
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Fan
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Microphone
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Keyboard
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Touchpad
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Show
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Energy swap
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USB ports
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Audio ports
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Digital camera
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Place the eliminated parts in a protected place.
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The motherboard meeting is now eliminated.
| Screw Measurement | Amount |
|---|---|
| M2x3mm | 10 |
| M2x4mm | 6 |
| M2x5mm | 4 |
Unplugging and Eradicating Cables
Battery Removing
Earlier than you start disassembling your Dell Latitude 7490, it is important to unplug and take away all cables. Disconnect the AC adapter and some other cables linked to the laptop computer.
Keyboard Removing
To take away the keyboard, first, find the screws securing it to the chassis. Often, there are two screws on the underside of the laptop computer. As soon as the screws are eliminated, fastidiously elevate the keyboard upward to launch it from the chassis.
Touchpad Removing
To take away the touchpad, you will must detach the battery first. Then, find the 2 screws securing the touchpad to the chassis. Take away the screws and gently elevate the touchpad to launch it.
Show Removing
Eradicating the show is a little more concerned. First, you will must take away the highest cowl of the laptop computer. As soon as the highest cowl is eliminated, you possibly can entry the show meeting. Find the screws securing the show to the chassis and take away them. Fastidiously elevate the show to launch it.
Backside Cowl Removing
To take away the underside cowl, first, take away the screws securing it to the chassis. Then, gently elevate the underside cowl to launch it.
Motherboard Removing
To take away the motherboard, you will must disconnect all cables and connectors hooked up to it. As soon as the cables are disconnected, find the screws securing the motherboard to the chassis and take away them. Fastidiously elevate the motherboard to launch it.
Cooling Fan Removing
To take away the cooling fan, you will must find the screws securing it to the chassis. As soon as the screws are eliminated, fastidiously elevate the cooling fan to launch it.
Reminiscence Removing
To take away the reminiscence modules, find the clamps securing them to the motherboard. Gently push the clamps outward to launch the reminiscence modules. Then, fastidiously pull the reminiscence modules out of their slots.
Cable Disconnection
After eradicating the mandatory parts, you will must disconnect all cables and connectors hooked up to the laptop computer. This contains the facility cable, show cable, touchpad cable, and some other cables linked to the motherboard.
| Cable | Location |
|---|---|
| Energy Cable | Linked to the motherboard |
| Show Cable | Linked to the show meeting |
| Touchpad Cable | Linked to the touchpad |
| Different Cables | Varies relying on the particular laptop computer mannequin |
Accessing Inside Elements
1. Put together the Workspace
* Guarantee a clear, well-lit, and anti-static work setting.
2. Take away the Battery
* Find the battery launch latch on the underside of the machine.
* Slide the latch to launch the battery and elevate it out.
3. Take away the Again Cowl
* Determine the screws securing the again cowl (sometimes 9 screws).
* Use a Phillips #0 screwdriver to unscrew them.
* Fastidiously elevate the again cowl off the machine.
4. Disconnect the Show Cable
* Use a plastic spudger to softly pry up the show cable connector.
* Pull the cable straight as much as disconnect it.
5. Take away the Show
* Elevate the show meeting up and away from the machine.
6. Disconnect the Battery Cable
* Find the battery cable connector on the motherboard.
* Use a plastic spudger to pry up the connector.
* Pull the cable straight as much as disconnect it.
7. Take away the Warmth Sink
* Unscrew the screws holding the warmth sink in place (sometimes 4 screws).
* Fastidiously elevate the warmth sink off the motherboard.
8. Take away the Motherboard
* Unscrew the screws holding the motherboard in place (sometimes 10 screws).
* Gently elevate the motherboard out of the machine.
9. Accessing the Fan and Cooling System
* The fan and cooling system may be accessed by eradicating the next parts:
* Warmth sink
* Energy button board
* Speaker module
* Keyboard
| Part | To Take away |
|---|---|
| Warmth sink | Unscrew the screws holding it in place and elevate it off. |
| Energy button board | Disconnect the cable and take away the screws holding it in place. |
| Speaker module | Disconnect the cables and take away the screws holding it in place. |
| Keyboard | Disconnect the cable and take away the screws holding it in place. |
Reassembling the Dell Latitude 7490
After you have reattached the battery, you possibly can start reassembling the Dell Latitude 7490.
Begin by aligning the underside case with the highest case.
- Ensure that the hinges are lined up correctly.
- Press down on the underside case till it snaps into place.
Subsequent, reattach the screws that you just faraway from the underside case.
- Use a Phillips #00 screwdriver to tighten the screws.
- Ensure that the screws are tightened securely, however don’t overtighten them.
Lastly, reattach the show meeting to the underside case.
- Align the show meeting with the underside case.
- Press down on the show meeting till it snaps into place.
Listed here are some further ideas for reassembling the Dell Latitude 7490:
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| After you have reassembled the Dell Latitude 7490, you possibly can energy it on and take a look at it to guarantee that it’s working correctly. |
How To Take Aside Dell Letitude 7490
To take aside a Dell Latitude 7490, you will have the next instruments:
- A Phillips #0 screwdriver
- A Torx T5 screwdriver
- A plastic spudger
After you have gathered your instruments, comply with these steps:
- Take away the six screws on the underside of the laptop computer utilizing the Phillips #0 screwdriver.
- Pry off the underside cowl utilizing the plastic spudger.
- Disconnect the battery cable by gently pulling it straight up from the motherboard.
- Take away the 4 screws that safe the heatsink to the motherboard utilizing the Torx T5 screwdriver.
- Elevate the heatsink off of the motherboard.
- Disconnect the fan cable from the motherboard.
- Take away the 2 screws that safe the fan to the heatsink utilizing the Phillips #0 screwdriver.
- Elevate the fan off of the heatsink.
- Take away the 4 screws that safe the motherboard to the chassis utilizing the Torx T5 screwdriver.
- Elevate the motherboard out of the chassis.
Individuals Additionally Ask
How do I take away the keyboard from a Dell Latitude 7490?
To take away the keyboard from a Dell Latitude 7490, you will have to take away the next screws:
- Two screws on the highest of the keyboard
- Three screws on the underside of the keyboard
After you have eliminated the screws, you possibly can elevate the keyboard up and away from the laptop computer.
How do I substitute the battery in a Dell Latitude 7490?
To switch the battery in a Dell Latitude 7490, you will have to take away the next screws:
- Two screws on the underside of the laptop computer
After you have eliminated the screws, you possibly can elevate the battery out of the laptop computer.
How do I improve the RAM in a Dell Latitude 7490?
To improve the RAM in a Dell Latitude 7490, you will have to take away the next screws:
- Two screws on the underside of the laptop computer
- One screw on the highest of the laptop computer
After you have eliminated the screws, you possibly can elevate the duvet off of the laptop computer and entry the RAM slots.
