No, this may not boot at all without the battery.
It's better to check first what you can easily check.
The test points are there to test the main board without anything external connected.
That's why most of the test points are adjacent to connectors.
You have to test the reaction to the power button so there are test points there for the contacts and any little indicator.
If all this doesn't work we'll have to proceed otherwise.
As I said, there is a stage one, a step two and a procedure C
