Originally Posted by DNSB
One quick check on the USB connection which works if your computer beeps when an USB device connects is to plug your N647 and power it on. If you hear a beep, that suggests the pre-boot code has enabled/disabled USB. Did you use a new µSD card? If not you may want to try one. Otherwise, you are likely to be having a hardware issue which is not going to be worth fixing.
PMs sent.
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