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crwdns2944351:0crwdnd2944351:0ATT CL4940 Motherboard Replacementcrwdnd2944351:0crwdne2944351:0

crwdns2933797:0Noah Nicoletticrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Noah Nicoletti

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Introduction
Use this guide to replace thea faulty or broken motherboard onin your ATT CL4940 telephone.
The motherboard is the main circuit board which provides all connectivity between the hardware components of the device. A faulty motherboard can cause your device to run slow, and in some cases not work at all. Some reasons for motherboard failure are due to:include overheating, dust, power surges, and old age.
* Overheating
* Dust
* Power surges
* Old age
Before using this guide, make sure to check out the page on [guide|750|soldering and desoldering] as this will be an important skill in step 5.
Be sure to ***unplug your device*** before starting as to avoid any electrical related injuries and/or damages.