When running on battery displays the following message-
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The computer is docked and only battery power is detected. this can happen if the power adapter is missing, the power cord is unplugged, or the computer is not properly connected to the docking station. you should undock, redock, attach the power adapter, or plug in the power cord.
Strike the F1 key to shutdown.
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Im not using the docking procedure

When turned on the power supply is working properly. may be a malfuction on the motherboard?

What is the voltage at 17 pin U4 (PI3L500)?

Hello,
I completely took the laptop apart and I plug on the motherboard just the HDD, Display and the RAM just for a quick check. After powering the system up, all started fine without any errors.
Shut it down and then I attached the modem module start all back up…all OK.
Shut it down and I attached the Wireless module, started but with an error. Took it out…all OK, put back the module back in …will not work.
I took off the wires from the module and started back up….it worked, I reconnected the wires back up and since then it works fine.
I do not understand where or what the problem was.
Thank You.

i think your wireles module socket was dirty.
wash it with solvent.

Вы проверить зарядное устройство раздел на материнской плате?