Chosen Solution
Hi, I’ve changed my battery and everything went fine until I tried to boot up the computer. It’s doesn’t start and make the noise, the apple logo and the progress bar but it ends suddenly shutting down and trying to boot up again without succeeding and repeating again ans again. i tried to start with the battery disconnected it does the same. it actually looks like the battery isn’t connected when I connect it because it does exactly the same with or without the battery connected. i tried resetting SMC and NVRAM i don’t know what to try more does someone have any suggestions ?? Thank you for your time
@hmgnt - Time to contact the supplier for a replacement.