Third, the small current does not boot :

    Small current does not boot , mostly in the logical part of the problem is not normal , 13M master clock failed to start ;

Such as V998, CPU Weld, often caused by temporary Weld small current does not boot , the general in this case , V1 is 2 75V;. Again three tail end of the phone is inserted moldy water shorted , also caused a small electric current does not boot ; the Nokia 8210 phone also touched 32. 768K crystal damage caused by current of only 5mA can not boot .

    T191 mobile phones, Amoi A6, A8 cell phones, mobile phones and other bridge C188 , also often this failure , and some anti- clip battery positive and negative legs can boot , A6, A8 electricity as ineffective anti- clip , it can first press any key after pressing the power button , the general can boot , but sometimes after repeated several times in order to boot normally .

    Also caused a small current software does not boot , but generally at this time is greater than 40mA current response over there to stay phenomenon .

 

    Maintenance Example :

    ( 1 ) Oriental Dragon 218 Mobile: does not boot . Press the power button lights up the screen , without any display, key invalid. Customers say is no reason to reflect on failure , and not into the water or went overboard . Rule of thumb , it may be CPU internal program error , caused by self-checking power supply IC can not properly reset , causing malfunction . Motorola T191 phone crashes similar phenomena, with positive and negative power meter to the mobile phone reverse discharge, the CPU is reset , test machine , has been able to boot normally .

 

    ( 2 ) the bridge D1 does not boot : press the power button has a 20mA current , stops moving , internal screen is not displayed , nor light ( the flip is closed and then opened with lights , but does not display ) , the external screen shows the battery box, there are lights. At first I thought and T191 mobile phone power automatic protection failures , like the power of positive and negative anti- clip on the line , with the knowledge to counter- clip several times, does not work, "trick" out of order ! This is wrong, it can be determined empirically hundred percent software problem , if there is software to write again, certainly power , the question is where the software ? Just bite the bullet and done, boasted to the customer who told me oh ! ! ! After much deliberation, do not remember what time on what places to see , failure is almost merely Amoi A8 phone repair a move that may be pressing " * " key , and then press the power button , you can boot, regardless of seven twenty- one, and give it a try , Oh, really boot ! Replace the battery , it does not work ! Again, boot, well, then shut down , press the power button boot, remove the battery , and this time the line, press the power button will be able to boot up !

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