First, assuming that the battery is charging properly, there are two other connection issues that may cause this. An insulating film can build up on the contacts in the battery compartment or one of the contacts can lose tension. Clean the contacts in the battery compartment using q-tips with a small amount of alcohol and clean q-tips to dry the contacts. In addition, check their position in reference to the contacts on the battery.
Also, have you tried completing the setup with the memory card removed? If not, please do so, as checking the read/write function is part of the self check portion of the start up process.
Please keep in mind that my diagnosis & solutions provided are directly dependent on the accuracy of your description of the problem. As with any "do it yourself" fixes, success is a "team effort", since I can't see or touch the camera, and relies on the customer's manual dexterity and ability to follow the instructions well. If the "do it yourself" approach doesn't work out for you and you need conventional repair, please let me know.
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