In this guide I explain how to disassemble Acer Aspire 5740/5340 series laptop.
I will show how to remove the motherboard.
Main disassembly steps:
STEP 2-5: Removing the hard drive, memory and DVD drive.
STEP 6-11: Removing the keyboard.
STEP 12-17: Removing the display assembly.
STEP 18-22: Removing top cover assembly.
STEP 23-30: Removing the motherboard. Accessing cooling fan and DC jack.
First of all, make sure the computer is turned off and battery removed.
Remove screws securing the hard drive and memory covers on the bottom.
Lift up and remove both covers.
Both memory slots are located on the bottom.
Acer Aspire 5740 can take up to 8GB RAM total (up to 4GB module in each slot).
Memory specs: PC3-8500 DDR3-1066 204pin SDRAM SODIMM.
This laptop supports Dual-Channel SDRAM support. In order to run it in Dual-Channel mode you must have two identical memory modules in both slots.
I’ll leave both memory modules connected to the motherboard.
Remove one screw securing the hard drive. Slide the hard drive to the shown direction to disconnect it from the motherboard.
Lift up and remove the hard drive.
Acer Aspire 5740/5340 has a regular 2.5″ SATA hard drive installed. You can replace it with any large capacity 2.5″ SATA hard drive or SSD.
Pull the DVD drive and remove it.
The DVD drive was secured by one of the screws we removed in the step 2.
Carefully lift up the keyboard bezel with a small screwdriver.
Do not move the cover to far because the media button board (attached to the cover) still connected to the motherboard.
Turn the keyboard cover upside down.
Here you can see the media button board which is attached to the keyboard cover.
Before you can remove the cover it’s necessary to unlock the connector and release the cable.
On the following picture the connector shown in the locked position.
Lift up the brown locking tab with your fingernail. It will open up at a 90 degree angle.
NOTE: the locking tab must stay attached to the connector base.
On the following picture the same connector shown in the unlocked position.
Now you can pull cable from the connector.
After you release the cable you can remove the keyboard cover completely.
The keyboard secured by three locking latches on the top.
Push each latch with a small screwdriver and lift up the keyboard.
After all three latches are unlocked you can lift up the keyboard and place it upside down on the palmrest.
Be careful, the keyboard still attached to the motherboard.
Disconnect the keyboard cable using the same technique as in the step 7.
After you disconnected the keyboard cable from the motherboard you can remove the keyboard.
In the following six steps I’ll show how to remove the display assembly.
In order to do that we’ll have to disconnect the wireless card antenna cables first.
Turn the laptop upside down and disconnect two antenna cables from the wireless card.
You can leave the wireless card connected to the motherboard.
Pull both antenna cables though the opening in the top cover.
Un-route both cables.
Remove two screws securing display hinges on the bottom.
Disconnect video cable from the motherboard.
Remove two screws securing display hinges.
Lift up and remove the display assembly.
Remove all screw from the bottom (I could have missed one or two on this picture, so check all screws carefully).
Disconnect the following cables from the motherboard:
1. Touchpad cable.
2. Touchpad button board cable.
3. Left speaker cable.
4. Media button board cable.
Disconnect cables 1, 2 and 4 same way you disconnected cable in the step 7.
Update: there are three screws securing the top cover on the top. I forgot to show them. Don’t forget to remove this screws.
Disconnect the left speaker cable from the motherboard.
Start separating the top cover assembly from the base.
Remove the top cover assembly.
On the other side of the top cover assembly you can access the left speaker, touchpad and touchpad button board.
After the top cover assembly removed you can access the motherboard, CMOS battery (replaceable), modem card and USB board.
Remove one screw securing the modem card.
Lift up the modem card and disconnect it from the motherboard.
Disconnect the right speaker cable from the motherboard (upper arrow).
Disconnect the USB board cable from the motherboard (lower arrow).
Remove one screw securing the motherboard.
Make sure the SD dummy card (or SD card) removed from the card reader.
Start removing the motherboard from the base as it shown on the following picture.
The motherboard removed.
The cooling fan assembly attached to the bottom side of the motherboard.
Acer Aspire 5740/5340 series laptop has DC power jack soldered to the motherboard.
If the jack fails, you’ll have to de-solder it from the motherboard and replace with a new one.
This disassembly guide might fit some other models in the Acer Aspire line. If it works for you, please mention the model number in the following comments.