I've had my T-mobile G1 for about 2 months; I used it several times today with no problems, but then for some reason it went black and appears to be shut off. I tried holding down every button, nothing.When i swich it on its work!! so why its shutting down suddenly.(this happend many times)
If cleaning and checking the terminals didn't work, you may have a broken motherboard. The T-Mobile G1 logic board isnottoo hard to replace. A good source for the part would be ebay. Thereis a step by step guide too that explains how to replace the board : T-Mobile G1 repair. There are also third party T-Mobile repair companies that do it for you.
Please check the battery terminals and be sure that it makes,and you can use a soft cloth and clean the terminals.
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