Here's the solution for Nokia 6720 classic with microSD memory card problem such as memory card not detected problem. This solution provides some hints on how to fix this problem.
If the device handset unable to detect any microSD card being inserted in it, you may first check the microSD card slot for possible damaged. Clean it if necessary.
If the slot seems okay, refer to the solution below, and check some components and connection line paths.
You may first check and trace the memory card supply voltage and ground pins connection, Then the memory detect switch, you can read voltage on this spots when the microSD card is not inserted. The memory card detection switch is connected directly to the CPU chip.
All the rest of microSD pin were connected to the Power IC (GAZOO). You can't check and trace the line paths of this pins unless you may remove the GAZOO chip, therefore for further troubleshooting there is an instance that you need to reheat or rework the power chip.
If the device handset unable to detect any microSD card being inserted in it, you may first check the microSD card slot for possible damaged. Clean it if necessary.
If the slot seems okay, refer to the solution below, and check some components and connection line paths.
Nokia 6720C MMC Memory Card Not Detected Solution
All the rest of microSD pin were connected to the Power IC (GAZOO). You can't check and trace the line paths of this pins unless you may remove the GAZOO chip, therefore for further troubleshooting there is an instance that you need to reheat or rework the power chip.
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