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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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crwdns2933801:0crwdne2933801:0
Introduction
ReplacingUse this guide to replace the motherboard on your ATT CL4940 telephone will involve the following:.
Skills required:
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:
* Soldering/de-soldering
Special tools:
* 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.
* Soldering and de-soldering instruments
* Metal spudger
Overview:
* Unplug your device before beginning disassembly.
* Unscrew the exterior screws
* Remove the cover using the metal spudger
* Unscrew the motherboard screws
* Detach the motherboard with the de-soldering tool and replace using the soldering tool
* Reassemble
Be sure to unplug your device before starting as to avoid any electrical related injuries and/or damages.