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(3) T191 phone does not boot : broken, throw rotten display , power , press the power button no current response , sometimes pressing CPU, power parts of 10mA current, let go to zero. Disassemble , carefully add solder over power and CPU, OK, boot normally.
(4) N8210 phone does not boot : into the water , cleaned before using for some time, will not boot up , power test machine , the current is very small, pay attention not see a current response, only 5mA, the suspect may be no time washes clean , then carefully cleaned again, still does not boot , can not write software and computer on-line , ask the owner is under what circumstances does not boot , the owner , said this morning the alarm rang a few times, will not boot , well , in that case , from the 32. 768K crystal start , removed 32. 768K crystals taken from a scrap board replaced , power , uh , boot up !
( 5 ) licensed Samsung T408 phone does not boot into the water : After entering the water has been cleaned in other mobile phone shop before, can not boot, press the power button to 100mA current rise office, let go back to zero , you can not boot. After careful washing machine panels, connected computer , normally written software, but still can not boot , the current remains. Facing the board , calmly, just phone into the water , and the current at 100mA, power supply and CPU can be excluded and the fonts physical damage. Plug the opposite end of the two profusely exclusion , still ; then plug in the tail pipe five feet off the side , still not boot. Through interrupted with a multimeter to measure , inserted at the end of the two small capacitors, was found near the left end of the capacitor has resistance at one end of the earth , causing capacitor leakage is suspected , the test machine is powered removed , Oh, the phone is switched the ! ! !
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