I found this interesting. Board connected normally using micro USB connector.
Using DVM, I see 4.72 volts at the 2 test points you mention. Also, I have another DVM right on the source Li battery. It shows 5.17 volts. Now, I find a hole on board marked 5V. It’s behind the the double lever switch. I use my DVM and measure 5.17 also. I’m using the ground you mention. So, do you think this might be the spot to feed 5 volts to the board and not the JP1 pin?
Maybe I should power off and look for 0 ohms from the microUSB connector and the 2 test points? Need to use a sewing needle!
UPDATE Looks like you are correct! JP1, either pin has continunity to the 5 volt pin of the micro USB connector. The round hole near the power switch labelled 2 has continunity to the ground pin of the microUSBconnector. The 5.17 volts I see at the hole marked 5V and other places is probably after a boost circuit. Don’t think the board would like 4.72 volts all over it. Thanks Imantuno and Zoltan