How can my phone not open?
Logic circuit is not normal caused by the logic circuit does not focus on the maintenance of the CPU chip select signal SM and the permit signal oe, these signals are important, but the key is to find these signals.
System clock and reset is not normal caused by the boot system clock is one of the conditions of cpu normal work.
The battery and the various parts of the power supply circuit is not caused by the failure of most of the phone.
Power ic is not normal cause not to start the phone to work properly, the power circuit to output a normal voltage supply to the load circuit in the power supply circuit
The boot line is not normal caused by the normal boot, press the boot button, the trigger key of the power button should be significantly changed, if no change, the general boot key is bad or the boot line is broken.
