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Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement

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  1. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement, Acer Chromebook CB5-312T-K 8Z9 Back Cover: crwdns2935265:01crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement, Acer Chromebook CB5-312T-K 8Z9 Back Cover: crwdns2935265:01crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • First begin by flipping the laptop on its back and having the back cover face you directly.

    • Then unscrew the ten Phillips head screws that hold down the back cover using a Phillips #0 Screw Driver.  

  2. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:02crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Using a plastic spudger, open the back cover and remove it from the laptop.

  3. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement, Battery: crwdns2935265:03crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement, Battery: crwdns2935265:03crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement, Battery: crwdns2935265:03crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • look for the battery in the bottom half of the computer

    • Once you have found the battery, look for the screws that secure the battery, in the upper left and right corners.

  4. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:04crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:04crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:04crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Begin by unscrewing the two Phillips head screws that hold down the battery using a J1 sized screwdriver.

    • Finally remove the battery from the laptop.

  5. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement, Motherboard: crwdns2935265:05crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement, Motherboard: crwdns2935265:05crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement, Motherboard: crwdns2935265:05crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Remove the yellow tape covering the ribbon cable in the bottom left of the motherboard as shown.

    • Carefully remove the ribbon cable out from the connector.

  6. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:06crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:06crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:06crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Fold up the grey cover to release the ribbon cable in the bottom right of the board as shown.

    • Carefully pull out the ribbon cable from the port by the blue tape.

  7. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:07crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:07crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:07crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Fold up the white cover to release the ribbon cable in the top left of the board as shown.

    • Carefully pull out the ribbon cable from the port by the blue tape.

  8. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:08crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:08crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:08crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Fold up the grey cover to release the cable on the top right of the board as shown

    • Carefully pull out the cable from the port.

  9. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:09crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:09crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Remove the cable with tweezers as shown along the top of the board.

  10. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:010crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:010crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Carefully pull off both brass connectors from the top left of the board with tweezers as shown.

  11. Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:011crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:011crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Acer Chromebook CB5-312T-K 8Z9 Motherboard Replacement: crwdns2935265:011crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Remove the six screws from the board as shown. There are two types of screws here, so be careful to keep them separate for reassembly.

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

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Robert McCullough

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128 crwdns2915208:0crwdne2915208:0

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University of North Texas, Team S1-G4, Thompson Fall 2017 crwdns2935289:0University of North Texas, Team S1-G4, Thompson Fall 2017crwdne2935289:0

UNT-THOMPSON-F17S1G4

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crwdns2944067:07crwdne2944067:0

thanks for the write up! do you know where the bluetooth is on the motherboard? I presume step 10 are the connections to the wifi antennae?

leerandmcnally - crwdns2934203:0crwdne2934203:0

This Chromebook likely uses a dual chip which can be seen in step 10. I’m guessing the chip is a 802.11AC 2x2 MIMO WLAN + Bluetooth 4.0 from looking at the specs.

Blake Klein -

wich is the firmware write protect screw on the motherboard to cheng the os to win10 ??

loudikov - crwdns2934203:0crwdne2934203:0

This is an ARM MT8173 machine, no Windows 10 for this hardware… Win10 for ARM is still on ARM based Surface, and gives poor experience.

Roberto Giuffrè -

Bonjour,

J ai un chromebook CB5-312T quelle carte mère je dois acheter et où mon chromebook ne s allume plus.

Merci

Celine Gaidot - crwdns2934203:0crwdne2934203:0

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