Question : Problem: Sony VAIO VGN-T370P/L PC Notebook

laptop works fine if the battery is not installed. If the battery is installed it will not boot up at all. Tried new battery - same result. Battery light continually blinks.  ....we get a message the installed battery may not be compatibly with computer or installed correctly (but it is the right battery and is installed correctly). The battery light continues to flash on and off and operating system will not load?

Answer : Problem: Sony VAIO VGN-T370P/L PC Notebook

it seems you have a bad charger section in the laptop; i fear you should turn it in for repair
any warranty left?   normally 2 years..