Wi-Fi Freezing fault may occur due to 10% of Wi-Fi driver related issue and 90% of WiFi hardware fault,
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Simply you can use hot air flow to [http://2.bp.blogspot.com/-uO-zVOxb4Qs/VAYPy525cOI/AAAAAAAAAHE/mSMiG13EoAE/s1600/s7562%2Bauto%2Boff%2Bsome%2Btime.jpg|U204] module and check whether it's functioning back other wise you will have to repalce new U204 Wi-FI + BT module
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Simply you can use hot air flow to [http://2.bp.blogspot.com/-uO-zVOxb4Qs/VAYPy525cOI/AAAAAAAAAHE/mSMiG13EoAE/s1600/s7562%2Bauto%2Boff%2Bsome%2Btime.jpg|U204] module and check whether it's functioning back to normal
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other wise you will have to repalce new U204 Wi-FI + BT module
[http://www.ebay.com/itm/2pcs-new-WIFI-module-ic-chipset-6005G-CF1B-for-samsung-S7562-repair-works-/291280799349?hash=item43d1b04675|Here] you can find parts for repair
Note : BGA reworking skills required to replace WiFi module
Dear All,
Wi-Fi Freezing fault may occur due to 10% of Wi-Fi driver related issue and 90% of WiFi hardware fault,
Simply you can use hot air flow to [http://2.bp.blogspot.com/-uO-zVOxb4Qs/VAYPy525cOI/AAAAAAAAAHE/mSMiG13EoAE/s1600/s7562%2Bauto%2Boff%2Bsome%2Btime.jpg|U204] module and check whether it's functioning back other wise you will have to repalce new U204 Wi-FI + BT module
[http://www.ebay.com/itm/2pcs-new-WIFI-module-ic-chipset-6005G-CF1B-for-samsung-S7562-repair-works-/291280799349?hash=item43d1b04675|Here] you can find parts for repair
Note : BGA reworking skills required to replace WiFi module
Hope you will be able to fix the fault your self.
Cheers!