Chosen Solution
On the above machine, now I get an X in the battery icon instead of an outlet or thunderbolt. I tried another battery on it. The swap showed the thunderbolt for a little while and then went back to the X. I don’t think that it is the battery since it happened to two batteries at the same time. My guess is that it could be the DC to DC board. BTW, the power adapter is glowing green. Any suggestions to fix this problem?
It’s either a strange coincidence that both batteries are bad, or your DC In board might need to be replaced. I would try to obtain another battery which you know for certain is in working order and test with that. If you get the “X” again, then replace the DC in board. Does the machine boot without the battery and just the power supply plugged in? Remove the battery and boot with power supply only and chime back in and let me know the results.
You can easily check the output voltages on the connecting pins in the battery compartment using a multimeter. The two outer pins are ground, the inner ones should read something around 3,5 volts each. Be careful not to short anything.
