thank you geoff for your reply .
the battery is failed the voltage of the battery is approximately 2 volts . in a normal system , when we remove the battery , the charge indicator led begin to blink . but in this system charge indicator led is green without any change . i removed the battery and try to power on it without battery . but didn't occurred any changeand it did't power on . in a normal system it work without battery normally by a massage that indicate the battery is removed from the system .
and i don't check it with a good battery . can you help me ???
thank you .

Last edited by hassan; 31/12/12 12:32 PM.